Customizable "Smart Remove" ala 'rsnapshot'

This probably should go in wish list. Instead of "Smart Remove," it may be better to have "Smart Keep" as is done by rsnapshot. So the GUI could look like this:

Snapshot frequency Number-of-savepoints
5 minutes 0
Hourly 24*2
Daily 7
Weekly 4
Monthly 12
Yearly -1 ( <0 would mean all)

Of course, the 'Number-of-savepoints' should be customizable by the user.