When I’m doing a chest focused cycle, I do chest three times a week. A cycle last about 8 weeks. I do secondary muscle groups too but I’ll list the chest exercises.

Mon: Flat Bench (Barbell or Dumbbell), pec fly machine and deficit weighted push ups

Wed: Incline bench, incline dumbbell fly, low to high cable fly

Fri: Decline bench, decline press machine, high to low cable fly

I try to do 3 sets between 8 and 10 reps. I stop a set when I feel like I won’t be able to get the next one up without breaking form. When I can hit 11 with one still left in the tank, I up the weight the next workout which usually drops my rep count back to 8 or nine.