delete history based on item timestamp

**Problem statement**
Sometimes, I lose some past items because the task at hand is heavy in copy-pasting. On the other hand, sometimes a password stays in my history for too long because of Ctrl-C inactivity.

**Describe the solution you'd like**
Instead of number-based history, it would be great to have an option to delete history based on item timestamps, for example delete items older than 6 hours.

**Describe alternatives you've considered**
I'm not aware of any alternative.

Thanks for the great tool!