Its a business call, whether you want to see the Year or Quarter.
In Both the cases you may need the Set Analysis in Expression to get correct comparison.
Have a look at the below link for more help.
Thank you for sharing the link to me which have very useful SET expression .
Now my issue is on the Bar chart if I use by year is not correct , because the rest of bar is full year .
If I using the month is correct but I unable see the last 3 year trend. Same for quarter.
May be I will using YOY , so that I can compare all bar with same period. That is Jan till Sept.