The one I've heard most about is 16:8, which would mean e.g. first meal being lunch at 12 and last one dinner before 20, resulting in a 8-hour eating window, and a 16 hour fasting one.

16/8 and alternate day are the most studied and popular to the best of my knowledge and seem to have pretty similar results. As said, there are countless variants out there.

For me personally, „skipping breakfast“ comes close enough as an oversimplification in practice.