Filter by last call date

Suggestion! A filter for "Last time called" or "last call date" would be useful.

I have lots of internet leads on email drips, but my priority is to get them on the phone. So if I have emailed them 10 times but never called them, I want to make sure I call them, too.

I'm currently using power dialer to dial through my "Hotness-C" list.

(I categorize hotness as:
A-past clients and great referral sources
B-warm/SOI/likely to do business this year
C-cold/strangers/new internet leads/who knows?)

And being able to filter for Power Dialer as "C" and "Not called this week" would be excellent.

Thank you!