Create report of the 10 highest users

Hello,

In WHD 12.1.0 it is kind of easy to create a report showing 10x departments which opened the most tickets in the last, lets say, 3 month. I believe this is a very useful report.

I would like to create a similar report of 10x clients which opened the most tickets in the last, again lets say, 3 month. I tried reports and queries, but it is not obvious to me at the moment of how to do this.

I was wondering if somebody already has done this and can point me in the right direction. Thank you for your help.

Regards,

Eberhard