I'm needing to do some maintenance on a site, and I'd like to time it for the least busy time of the week. I know how to make a custom report to show what the least busy day is, as well as what the least busy hour of a (generic) day is, but I'm not sure how to combine those two to find the least busy hour of the week.
I know that generally speaking, the least busy day will have the least busy hour, but I'd like to see hard data, y'know?
EDIT: To clarify, I'm wanting to have a report that can basically say "4am on Saturdays" or some such.
EDIT 2: Incidentally, here's why I need the hourly graph to aggregate numbers from multiple weeks:
The site gets so little traffic that I need multiple weeks to arrive at any sort of meaningful conclusion.