Here are Casey's QB carries (not including sacks) by game, so these will also include scrambles off called pass plays: 1, 3, 8, 1, 2, 1, 2, 1, 8, and 3.
From those numbers, I would say that the QB run game was pretty much non-existent with Casey under Whipple. There may have been zone "reads" called where there was no read. It was just a simple zone running play to the I-Back. There was a large disconnect in what Frost wanted in the overall run game and what Whipple's play calling was. If Whipple wasn't calling QB run plays, I would say he doesn't have a good handle on how to design and coach the QB run game.