At present that would require two tests. You could have one test to check every 5 minutes, and auto-pause outside business hours, and other to check every 15 minutes, and auto-pause during business hours.

In a future version (perhaps 3.2 or so) I want to change the scheduling options to enable such options. I plan to merge the frequency options and the Auto Pause features into the ability to add multiple frequencies, each with their own active day/time range.