Aisla,
I'm an outlier, as the only facial hair I ever developed was on the chin, upper lip, and a tiny bit on the sideburns. I had first full clearance at around 25 hours on a 16 probe galvanic - I was that hirsute! It took about another 15 hours for the leftover growth to be cleared. With no HRT I think I was going back about once a year for a touchup (1 hour and appointment lengths dropping each year) to remove the dozen or so hairs that matured into full follicles, and only having to wave a razor over my face once every 4 days or so to deal with whatever pathetic hairs grew.
At the time I had no idea which way I was headed, but hated shaving my face due to the irritation involved, and my one week stubble was what my Greek friends would get in 4 hours!