I say it is up to you. There are many differences in the conditions the car is in, like in a garage most all the time (like my car) or in the hot sun of Nevada, or the acid rain down wind of a steel mill.
I seldom wax my car, but it is in a garage most of the time. My wife's car gets waxed more often, but it is considerable older and is often out in the weather.
I suggest you wax as needed.
.
.
.
.
. Needed means whatever you want it to mean.