diff --git a/src/constants/constants.js b/src/constants/constants.js
new file mode 100644
index 0000000..d413b10
--- /dev/null
+++ b/src/constants/constants.js
@@ -0,0 +1,156 @@
+export const knownLayoutChartOption = {
+    padding: {
+      top: 16,
+      left: 8,
+      right: 8,
+    }
+  };
+export const knownScaleLineChartOptions =  {
+x: {
+    type: 'time',
+    title: {
+    display: true,
+    color: '#334155',
+    font: {
+        size: 12,
+        lineHeight: 2
+    }
+    },
+    time: {
+    displayFormats: {
+        second: 'h:mm:ss', // ex: 1:11:11
+        minute: 'M/d h:mm', // ex: 1/1 1:11
+        hour: 'M/d h:mm', // ex: 1/1 1:11
+        day: 'M/d h', // ex: 1/1 1
+        month: 'y/M/d', // ex: 1911/1/1
+    },
+    },
+    ticks: {
+    display: true,
+    maxRotation: 0, // 不旋轉 lable 0~50
+    color: '#64748b',
+    source: 'labels', // 依比例彈性顯示 label 數量
+    },
+    border: {
+    color: '#64748b',
+    },
+    grid: {
+    tickLength: 0, // 網格是否超過邊線
+    }
+},
+y: {
+    beginAtZero: true, // scale 包含 0
+    title: {
+    display: true,
+    color: '#334155',
+    font: {
+        size: 12,
+        lineHeight: 2
+    },
+    },
+    ticks:{
+    color: '#64748b',
+    padding: 8,
+    },
+    grid: {
+    color: '#64748b',
+    },
+    border: {
+    display: false, // 隱藏左側多出來的線
+    },
+},
+};
+export const knownScaleHorizontalChartOptions = {
+x: {
+    title: {
+    display: true,
+    color: '#334155',
+    font: {
+        size: 12,
+        lineHeight: 2
+    }
+    },
+    ticks: {
+    display: true,
+    maxRotation: 0, // 不旋轉 lable 0~50
+    color: '#64748b',
+    },
+    grid: {
+    color: '#64748b',
+    tickLength: 0, // 網格是否超過邊線
+    },
+    border: {
+    display:false,
+    },
+},
+y: {
+    beginAtZero: true, // scale 包含 0
+    type: 'category',
+    title: {
+    display: true,
+    color: '#334155',
+    font: {
+        size: 12,
+        lineHeight: 2
+    },
+    },
+    ticks:{
+    color: '#64748b',
+    padding: 8,
+    },
+    grid: {
+    display:false,
+    color: '#64748b',
+    },
+    border: {
+    display: false, // 隱藏左側多出來的線
+    },
+},
+};
+export const knownScaleBarChartOptions = {
+x: {
+    title: {
+        display: true,
+        color: '#334155',
+        font: {
+        size: 12,
+        lineHeight: 2
+        }
+    },
+    ticks: {
+        display: true,
+        maxRotation: 0, // 不旋轉 lable 0~50
+        color: '#64748b',
+    },
+    grid: {
+        color: '#64748b',
+        tickLength: 0, // 網格是否超過邊線
+    },
+    border: {
+        display:false,
+    },
+    },
+    y: {
+    beginAtZero: true, // scale 包含 0
+    type: 'category',
+    title: {
+        display: true,
+        color: '#334155',
+        font: {
+        size: 12,
+        lineHeight: 2
+        },
+    },
+    ticks:{
+        color: '#64748b',
+        padding: 8,
+    },
+    grid: {
+        display:false,
+        color: '#64748b',
+    },
+    border: {
+        display: false, // 隱藏左側多出來的線
+    },
+    },
+};
\ No newline at end of file
diff --git a/src/module/timeLabel.js b/src/module/timeLabel.js
index c9916bb..e2860cb 100644
--- a/src/module/timeLabel.js
+++ b/src/module/timeLabel.js
@@ -289,5 +289,7 @@ export const setTimeStringFormatBaseOnTimeDifference = (minTimeStamp, maxTimeSta
  * @param {string} timeFormat For example, 'MM/DD'
  */
 export const mapTimestampToAxisTicksByFormat = (timeStampArr, timeFormat) => {
-  return timeStampArr.map(ts => moment(ts).format(timeFormat));
+  if (timeStampArr) {
+    return timeStampArr.map(ts => moment(ts).format(timeFormat));
+  }  
 };
\ No newline at end of file
diff --git a/src/stores/performance.js b/src/stores/performance.js
index ce7b05a..2c4a880 100644
--- a/src/stores/performance.js
+++ b/src/stores/performance.js
@@ -6,6 +6,12 @@ export default defineStore('performanceStore', {
     allPerformanceData: null,
     freqChartData: null,
     freqChartOptions: null,
+    freqChartXData: {
+      minX: null,
+      maxX: null,
+      xData: null,
+      content: null,
+    }
   }),
   getters: {
     performanceData: state => {
@@ -50,5 +56,12 @@ export default defineStore('performanceStore', {
     setFreqChartOptions(freqChartOptions){
       this.freqChartOptions = freqChartOptions;
     },
+    /**
+     * 
+     * @param {object} freqChartXData 
+     */
+    setFreqChartXData(freqChartXData) {
+      this.freqChartXData = freqChartXData;
+    }
   },
 })
diff --git a/src/views/Compare/Dashboard/index.vue b/src/views/Compare/Dashboard/index.vue
index a31f47f..3670cde 100644
--- a/src/views/Compare/Dashboard/index.vue
+++ b/src/views/Compare/Dashboard/index.vue
@@ -162,163 +162,13 @@ import { simpleTimeLabel, followTimeLabel, dateLabel,
   getYTicksByIndex,
  } from '@/module/timeLabel.js';
 import i18next from '@/i18n/i18n';
+import {
+  knownLayoutChartOption,
+  knownScaleLineChartOptions,
+  knownScaleHorizontalChartOptions,
+  knownScaleBarChartOptions,
+ } from "@/constants/constants.js";
 
-const knownLayoutChartOption = {
-  padding: {
-    top: 16,
-    left: 8,
-    right: 8,
-  }
-};
-const knownScaleLineChartOptions =  {
-  x: {
-    type: 'time',
-    title: {
-      display: true,
-      color: '#334155',
-      font: {
-        size: 12,
-        lineHeight: 2
-      }
-    },
-    time: {
-      displayFormats: {
-        second: 'h:mm:ss', // ex: 1:11:11
-        minute: 'M/d h:mm', // ex: 1/1 1:11
-        hour: 'M/d h:mm', // ex: 1/1 1:11
-        day: 'M/d h', // ex: 1/1 1
-        month: 'y/M/d', // ex: 1911/1/1
-      },
-    },
-    ticks: {
-      display: true,
-      maxRotation: 0, // 不旋轉 lable 0~50
-      color: '#64748b',
-      source: 'labels', // 依比例彈性顯示 label 數量
-    },
-    border: {
-      color: '#64748b',
-    },
-    grid: {
-      tickLength: 0, // 網格是否超過邊線
-    }
-  },
-  y: {
-    beginAtZero: true, // scale 包含 0
-    title: {
-      display: true,
-      color: '#334155',
-      font: {
-        size: 12,
-        lineHeight: 2
-      },
-    },
-    ticks:{
-      color: '#64748b',
-      padding: 8,
-    },
-    grid: {
-      color: '#64748b',
-    },
-    border: {
-      display: false, // 隱藏左側多出來的線
-    },
-  },
-};
-const knownScaleHorizontalChartOptions = {
-  x: {
-    title: {
-      display: true,
-      color: '#334155',
-      font: {
-        size: 12,
-        lineHeight: 2
-      }
-    },
-    ticks: {
-      display: true,
-      maxRotation: 0, // 不旋轉 lable 0~50
-      color: '#64748b',
-    },
-    grid: {
-      color: '#64748b',
-      tickLength: 0, // 網格是否超過邊線
-    },
-    border: {
-      display:false,
-    },
-  },
-  y: {
-    beginAtZero: true, // scale 包含 0
-    type: 'category',
-    title: {
-      display: true,
-      color: '#334155',
-      font: {
-        size: 12,
-        lineHeight: 2
-      },
-    },
-    ticks:{
-      color: '#64748b',
-      padding: 8,
-    },
-    grid: {
-      display:false,
-      color: '#64748b',
-    },
-    border: {
-      display: false, // 隱藏左側多出來的線
-    },
-  },
-};
-const knownScaleBarChartOptions = {
-  x: {
-      title: {
-        display: true,
-        color: '#334155',
-        font: {
-          size: 12,
-          lineHeight: 2
-        }
-      },
-      ticks: {
-        display: true,
-        maxRotation: 0, // 不旋轉 lable 0~50
-        color: '#64748b',
-      },
-      grid: {
-        color: '#64748b',
-        tickLength: 0, // 網格是否超過邊線
-      },
-      border: {
-        display:false,
-      },
-    },
-    y: {
-      beginAtZero: true, // scale 包含 0
-      type: 'category',
-      title: {
-        display: true,
-        color: '#334155',
-        font: {
-          size: 12,
-          lineHeight: 2
-        },
-      },
-      ticks:{
-        color: '#64748b',
-        padding: 8,
-      },
-      grid: {
-        display:false,
-        color: '#64748b',
-      },
-      border: {
-        display: false, // 隱藏左側多出來的線
-      },
-    },
-  };
 
 export default {
   setup() {
diff --git a/src/views/Discover/Performance/FreqChart.vue b/src/views/Discover/Performance/FreqChart.vue
index 4456a2c..1a685be 100644
--- a/src/views/Discover/Performance/FreqChart.vue
+++ b/src/views/Discover/Performance/FreqChart.vue
@@ -3,22 +3,151 @@
 </template>
 
 <script>
-import { computed } from 'vue';
-import  { mapState, mapActions } from 'pinia';
+import { computed, ref, watch, onMounted } from 'vue';
 import usePerformanceStore from "@/stores/performance.js";
+import {
+  setTimeStringFormatBaseOnTimeDifference,
+  mapTimestampToAxisTicksByFormat,
+ } from '@/module/timeLabel.js';
+ import {
+  knownScaleLineChartOptions,
+ } from "@/constants/constants.js";
 
-// 如果把 chart 獨立成一個 vue component
-// 是否可以防止 PrimeVue 誤用其他圖表 option 值的 bug?
+
+const cloneDeep = (obj) => JSON.parse(JSON.stringify(obj));
+
+// 試著把 chart 獨立成一個 vue component
+// 企圖防止 PrimeVue 誤用其他圖表 option 值的 bug
 export default {
   setup() {
     const performanceStore = usePerformanceStore();
 
     const freqChartData = computed(() => performanceStore.freqChartData);
-    const freqChartOptions = computed(() => performanceStore.freqChartOptions);
+    const originalFreqChartOptions = computed(() => performanceStore.freqChartOptions);
+    const minX = computed(() => performanceStore.freqChartXData.minX);
+    const maxX = computed(() => performanceStore.freqChartXData.maxX);
+    const xData = computed(() => performanceStore.freqChartXData.xData);
+    const content = computed(() => performanceStore.freqChartXData.content);
+    const customizedScaleOption = computed(() => {});
+
+    const updatedFreqChartOptions = ref(cloneDeep(originalFreqChartOptions.value));
+
+    const customizeOptionsFunc = () => {
+        // Customize X axis ticks due to different differences between min and max of data group
+        // Compare page and Performance page share the same logic
+      const formatToSet = setTimeStringFormatBaseOnTimeDifference(minX.value, maxX.value);
+      const ticksOfXAxis = mapTimestampToAxisTicksByFormat(xData.value, formatToSet);
+
+
+      customizedScaleOption.value = getCustomizedScaleOption(
+        knownScaleLineChartOptions, {
+            customizeOptions: {
+            content, ticksOfXAxis,
+            }        
+        });
+    };
+
+    const newTicksCallback = (value, index, values) => {
+      return value; // 沒有單位，只有數值，因為是取計算數量
+    };
+
+    const updateTicksCallback = () => {
+
+        //在這裡額外宣告本圖表的 callback， 區分跟其他圖表的 callback，避免共用 option 造成不預期的共用與混淆
+      if (updatedFreqChartOptions.value.scales && updatedFreqChartOptions.value.scales.y) {
+        updatedFreqChartOptions.value = customizedScaleOption;
+        updatedFreqChartOptions.value.scales.y.ticks.callback = newTicksCallback;
+      }
+    };
+
+    watch(originalFreqChartOptions, (newOptions) => {
+      updatedFreqChartOptions.value = cloneDeep(newOptions);
+    });
+
+    
+    /**
+     * Compare page and Performance have this same function.
+     * @param whichScaleObj PrimeVue scale option object to reference to
+     * @param customizeOptions 
+     * @param customizeOptions.content
+     * @param customizeOptions.ticksOfXAxis
+     */
+     const getCustomizedScaleOption = (whichScaleObj, {customizeOptions: {
+          content,
+          ticksOfXAxis,
+        },
+      }) => {
+      let resultScaleObj;
+      resultScaleObj = customizeScaleChartOptionTitleByContent(whichScaleObj, content);
+      resultScaleObj = customizeScaleChartOptionTicks(resultScaleObj, ticksOfXAxis);
+      return resultScaleObj;
+    };
+
+    /**
+     * Compare page and Performance have this same function.
+     * @param {object} scaleObjectToAlter this object follows the format of prive vue chart
+     * @param {Array<string>} ticksOfXAxis For example, ['05/06', '05,07', '05/08']
+     * or ['08:03:01', '08:11:18', '09:03:41', ], and so on.
+     */
+     const customizeScaleChartOptionTicks = (scaleObjectToAlter, ticksOfXAxis) => {
+      return {
+        ...scaleObjectToAlter,
+        x: {
+          ...scaleObjectToAlter.x,
+            ticks: {
+              ...scaleObjectToAlter.x.ticks,
+                callback: function(value, index) {
+                  // console.log('根據不同的級距客製化 x 軸的時間刻度');
+                  return ticksOfXAxis[index];
+                },
+            },
+          },
+      };       
+    };
+
+    /** Compare page and Performance have this same function.
+     * 在一個基本的物件上加以客製化這個物件，客製化的參照來源是 content 的內容
+     * 之所以有辦法這樣撰寫，是因為我們知道物件的順序是先 x 再 title 再 text
+     * This function alters the title property of known scales object of Chart option
+     * This is based on the fact that we know the order must be x -> title -> text.
+     * @param {object} whichScaleObj PrimeVue scale option object to reference to
+     * @param content whose property includes x and y and stand for titles
+     * 
+     * @returns { object } an object modified with two titles
+     */
+     const customizeScaleChartOptionTitleByContent = (whichScaleObj, content) => {
+      if (!content) {
+        // Early return
+        return whichScaleObj;
+      }
+
+      return {
+        ...whichScaleObj,
+          x: {
+            ...whichScaleObj.x,
+            title: {
+              ...whichScaleObj.x.title,
+              text: content.x
+            }
+          },
+          y: {
+            ...whichScaleObj.y,
+            title: {
+              ...whichScaleObj.y.title,
+              text: content.y
+            }
+          }
+        };
+    };
+
+    onMounted(() => {
+      customizeOptionsFunc();
+    });
 
     return {
       freqChartData,
-      freqChartOptions,
+      updatedFreqChartOptions,
+      updateTicksCallback,
     };
   }
 };
diff --git a/src/views/Discover/Performance/index.vue b/src/views/Discover/Performance/index.vue
index 694c443..3227396 100644
--- a/src/views/Discover/Performance/index.vue
+++ b/src/views/Discover/Performance/index.vue
@@ -118,6 +118,7 @@
                 <ul>
                   <li class="bg-neutral-10 mb-4 p-1 border border-neutral-300 rounded">
                     <span class="block font-bold text-sm leading-loose text-center my-2">{{ contentData.freq.title }}</span>
+                    <!-- <Chart type="line" :data="freqData" :options="freqOptions" class="h-96" /> -->
                     <FreqChart/>
                   </li>
                   <li class="bg-neutral-10 p-1 border border-neutral-300 rounded">
@@ -354,6 +355,11 @@ export default {
           }        
       });
 
+      // special case, freq chart case
+      if(whichCaller === "freqChartCaller") {
+        this.setFreqChartXData({ minX, maxX, xData, content});
+      }
+      
       primeVueSetData = {
         labels: xData,
         datasets: [
@@ -393,6 +399,7 @@ export default {
         },
         scales: customizedScaleOption,
       };
+      const {resultStepSize, unitToUse} = getStepSizeOfYTicks(maxY);
       switch (yUnit) {
         case 'date':
           primeVueSetOption.plugins.tooltip.callbacks.label = function(context) {
@@ -400,19 +407,12 @@ export default {
           };
           primeVueSetOption.scales.x.min = minX;
           primeVueSetOption.scales.x.max = maxX;
-          const {resultStepSize: YTickStepSize, unitToUse} = getStepSizeOfYTicks(maxY); // Stepsize only needs to be calculated once
           primeVueSetOption.scales.y.ticks.callback = function (value, index, ticks) {
-            switch(whichCaller){
-              case "freqChartCaller":
-                console.log('freqChartCaller', freqChartCaller);
-                return value;
-              default:
-                 return getYTicksByIndex(YTickStepSize, index, unitToUse);
-            }
-            return;
+            return getYTicksByIndex(resultStepSize, index, unitToUse);
           };
           break;
         case 'count':
+        default:
           primeVueSetOption.scales.y.ticks.precision = 0; // y 軸顯示小數點後 0 位
           primeVueSetOption.plugins.tooltip.callbacks.label = function(context) {
             return `${content.y}: ${context.parsed.y}`;
@@ -420,6 +420,7 @@ export default {
           break;
       }
 
+
       return [primeVueSetData, primeVueSetOption]
     },
     /**
@@ -749,8 +750,11 @@ export default {
           },
       };       
     },
-    ...mapActions(PerformanceStore, ['setFreqChartData']),
-    ...mapActions(PerformanceStore, ['setFreqChartOptions']),
+    ...mapActions(PerformanceStore, [
+      'setFreqChartData',
+      'setFreqChartOptions',
+      'setFreqChartXData'
+    ]),
   },
   async created() {
     this.isLoading = true; // moubeted 才停止 loading
@@ -792,8 +796,8 @@ export default {
     }
     [this.freqData, this.freqOptions] = this.getLineChart(this.performanceData.freq.cases, this.contentData.freq, 'count', "freqChartCaller");
 
-this.setFreqChartData(this.freqData);
-this.setFreqChartOptions(this.freqOptions);
+    this.setFreqChartData(this.freqData);
+    this.setFreqChartOptions(this.freqOptions);
 
     [this.casesByTaskData, this.casesByTaskOptions] = this.getHorizontalBarChart(this.performanceData.freq.cases_by_task,
       this.contentData.casesByTask, true, 'count');