It's really about every 30 hours or so for me. I shave every 24, tough it out for 5 days at a time and then skip a day on the weekends. Shaving every time the least little stubble begins to appear is just NOT GOOD for me. It's better to let it grow out a bit, and 24 hours is not quite enough. Unfortunatly, the Navy doesn't see it my way... (In boot camp, they'd make me shave twice a day and I was burning all the time, but there was nothing about boot camp that wasn't painful.)

I'm hoping that as my straight-razor shaving improves, I'll be able to get down to 24 hours. As it is, I've got some pretty good abrasions on my neck for my first straight-razor shave, so it'll be at least a couple of days before I try that again.