change' of pace'
1. a temporary shift or variation in a normal routine or regular pattern of activity: Reading a mystery novel has been a real change of pace for me.
2. Also called change-up Pronunciation: (chānj'up"). [key] Baseball.a ball that is thrown by a pitcher with the same motion as for a fastball but that travels with less speed, making the pitch more difficult for the batter to time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.