lol thanks. I'm not really a bodybuilder, but I have a little bit of knowledge.
twice a week per body part is a fine place to start. If you're growing, that's all that matters. If you notice that a particular bodypart is responding to training it twice a week well (like if you're not recovering well from training sessions), you could train that bodypart less frequently.
A couple examples: I do pull ups every time I go to the gym, usually about 50. I have no problem recovering from these. I do deadlifts at most once per week. Sometimes it's once every other week, because they're so fatiguing. You just have to figure out what actually WORKS for you. I've seen many programs that have people bench pressing twice per week. This doesn't work for me. I've tried it, and I just ended up injured. I'm not really built to press that often. Gotta learn by experience.