no, once a week and destroy it. 3 days a week would overtrain it and you'd actually lose size and strength. You should be focusing more on the form of each exercise as well so you overload the chest and not the tri's or shoulders. Warm up with two very light weight sets for 10-12 reps, and then move into your working weights. start with 2 pressing exercises, a third if you want to, then isolation with some form of flyes.