How often would you wax a new vehicle?

I just got a brand new truck, and didn’t opt for the protective coating the dealership offered at quite a cost.
I had that on my last truck and wasn’t impressed, so I figured I would just give it a good wax job a couple times a year.
A friend said I should wax it once a month, I think that is a bit excessive I figure a couple times a year will be good.
What are your thoughts?