Quidditch match only lasted about an hour.

Anyway, I didn't want to harp on Carrow too much, for fear it would influence the Governors to maintain him just to be contrary.

Sorry, Minerva, but I did try to emphasize that Hogwarts is no longer under your sole authority and that you're not entirely responsible for the problems you face. Still, by all means, jump in and defend yourself - and excoriate me in the process!