I had done a tweezing experiment just to see the rate at which the hair grows back without electro (I'd say on 1/3 of my face... chin, cheeks, sideburns) and here's what I've noticed for those interested…
Day 1: 2210 hairs removed in 2 days
Day 8-19: 1400 hairs gradually removed as soon as they could get grabbed by tweezers
Day 19-30: 580 hairs gradually removed
After the 1st clearing, I was completely hairless for about a week. New hair kept growing randomly afterwards. I suspect regrowth wasn’t from the already plucked hairs, so quite a high % of hairs are hidden at any time. However, I don’t see a way of knowing which hairs were which after a few weeks… What’s the consensus on the regrowth time for the same hair after a pluck on the face? What about the % of hidden hairs?
I could've certainly be a little more exact in my timing, or continued for a few months to see how many hairs would’ve needed to be plucked every week. I might redo this experiment depending on the answers or questions I find here (and my motivation)!