2-5 days a week depending on the time of year. I like to start out shooting up close to warm up while focusing on proper form, execution, and follow through. The key being not concentrating on aiming while doing this. 10 ft-10 yards. Then once I feel like I'm executing shots well, I will move back to start shooting 20 yards. If I'm not getting good results at 20 I won't start shooting longer distances. If I'm making small mistakes at 20 they will be magnified at 50 and beyond. Just shooting X number of arrows isn't going to help you become a better shooter IMHO. Overshooting can lead to problems like target panic in my experience.
I like to live by the mantra of quality over quantity. If you aren't concentrating on making every shot count in practice when you have plenty of time you will not be able to make the shot count when it NEEDS to. If you start to get really fatigued you should just put the bow away rather than wasting your time with imperfect shots and the frustration that will plague your mindset.
I somewhat agree with what Felix40 said but not entirely. Yes it's true you can dust off your bow and get decent results with a compound even if you haven't shot in months. For me, I put too much time and money into my hunts to settle for "decent" results. I like to be so confident that when I draw back my bow on an animal, there isn't a shadow of doubt in my mind that I can make the shot. Missing an animal happens even with good preparation but why not put the odds in your favor by erasing any doubt.