I admit I don't play blackjack and I played Mississsippi Stud maybe for a total of two hours in my life.

How many hands are dealt in an hour? I remember at a full table it took at least a minute and maybe two minutes per hand.
I also recall the dealer being changed during that hour. I don't recall if the dealer changed after 20 minutes or after 30 minutes or after 40 minutes.

Would the "bad dealer" flash a card in every hand?
In the case of multiple dealers per hour would both flash a card in every hand?