At my last job I took a 20% cut in pay to get a 4 day workweek. Every Thursday evening became “Yay! Three day weekend!”
4 on, 3 off is usual
But if you break it up to two week cycles you get: 4 on, 2 off, 4 on, 4 off 4 on, 1 off, 4 on, 5 off
And even wilder if you do three week cycles: 6 on, 2 off, 6 on, 7 off
Imagine a full week off every third week! Of course, this likely is not very realistic because it would not line up with collaborators well.