Hey people of BodyBuilding or my personal Trainner

Ok I need help to get my shoulder and Traps big.
I mean... when someone wear T-shirt u can see it.

should I need to lift more weights or do more reps.

should i work out this 2 body part 2-3 time a week or just 1 once a week.

how much rest, should i need, is it good idea to workout both part together?

tell me your most effect way to build bigger Trap and Shoulders

hope this help me, with... and

also any forarm exercise, you seen how the base ball player has forarm. ;)

thanks you all