Mach 3 = twice weekly to stay smooth
Wax = twice monthly (if that much) to stay smooth.
I am no stranger to waxing. I have waxed my entire body except speedo area for years I went to college on a swim schloraship and we (the team members) used to hold waxing parties on the weekend. I would go over my body with a blade the night before a meet (phsycology thing). Our coach used to give us something called NoMo that slowed and prevented hair from growing back. After waxing for 4 years and applying this, I stay smooth for 3-4 months at a time. I would strongly suggest looking into some hair inhibitor if you wax, it really helps extend the hair growth time.