I have 14 chickens in an 8x10 coop. My chickens free range all year, so their coop doesn't get very dirty. Unless it's winter time. I clean the coop every two weeks, and I put about 2 inches of pine shavings in there. Sometimes I have to clean mine more than twice a month. It depends on how much of a mess they make, and how the coop smells.
In the winter I use twice that amount of pine shavings, and I only clean it once every two months. If it starts to smell bad I just put another lair of pine shavings over it.
In the winter I use twice that amount of pine shavings, and I only clean it once every two months. If it starts to smell bad I just put another lair of pine shavings over it.