>>76532139 (OP)
>How many of those days should I be putting in a week?
At least 2, more are better but as long as you're training once every 3rd day, it's more about fatigue management than about extra growth (it's worth it if you end up doing more total sets, otherwise 2/week is good).
What are you already doing, what's your schedule?
If you're doing power cleans, or any sort of cleans, and deadlifts, you shouldn't even be asking about traps. Lats, you should do rows of every kind, until you find what works best for you. Pull ups are good, amazing if you can weight them, but you need to do sets of at least 6, better 8 or 10. For most, that's hard already without extra weights.
Shoulders: if you can deal with the mobility needed, btn press and upright rows are excellent. if you can't, any pressing movement and lateral raises are what you get. also enjoy doing any sort of extra overhead work. power snatches? jerks? handstands and handstands push ups? just go for it.