...
Issue Distribution: Shows the number of issues grouped by time intervals.
Average Line: Indicates the average time for issues based on the selected metric.
Default Bins: The histogram defaults to 7 bins, each representing a distinct time interval.
...
2.4 Issue Drill-Down
You can see all the tasks included in this selection by clicking on the time interval value below any bin.
...
So, you click on the interval, and a new tab will open for you in the Jira search with JQL, which will pull out all the tasks that belong to this or that bin.
...
3. Customizing the Histogram Chart
3.1 Adjusting Intervals
You can modify intervals to better suit your analysis better needs:
...
Bin Width: Define the number of bins (up to 50).
...