My experience was between 8-10 days off during my 28 day stretch. But my days were usually quite long, with 4 legs being most common. The CAAC requires a 36 hour break in any seven day period. 4 leg days combined with a 40 hour per week limit and the 36 hours off requirement resulted in 4-5 days on then 2-3 days off.

My contract paid monthly.