Depends. I would guess there is a bit difference between tony ferguson and johnny Hendricks
Varies by fighter, GSP was known to be in the gym regardless, just decreased the intensity. Rampage hated training, and the older he gets the less he bothers.
varies by fighter, some of the more established and seasoned fighters won't train period between camps
If they're doing steroids, they don't do much off training.
If they're not on steroids, they do a decent amount of off training.
Jon Jones didnt train striking for the whole year of 2016. Came back in 17' and KTFO Daniel Cormier with a Cro-Cop like high left kick