Hi Nessrine, 

OOB there is no field that can store this value, but as you said you can go for a new BR and field to store these details. Or if just for reporting purposes, I would recommend using metrics. 

https://docs.servicenow.com/bundle/paris-platform-administration/page/use/reporting/task/create-metr...

Please mark helpful, correct based on the correctness of the answer!

Thanks, Harneet!