15-20 hours most days of the week. I might eat breakfast once a week, lunch once or twice a week, the rest of the time, I only eat starting at about 4:30-5 when I get home from work. Sometimes breakfast and dinner only, sometimes breakfast, lunch, and dinner, sometimes just dinner. I try to keep it changing up and pretty much eat when I'm hungry.
Weekends, I'm pretty lax on. I usually eat a big breakfast at least one day of the weekend...like the 8 eggs, onion, handful of green beans, kohlrabi, truckload of basil and half head of garlic (all done up in pastured lard) with coffee that I'm having right this second.
I've tried the 24-on/24-off, but found myself sluggish on the eat days due to....eating.