We do Saxon… If I recall, Saxon Math 1 is meant to be done 4 days per week. I know it says specifically in the front introduction area of the book how often they suggest you do math with the program - I’m fairly confident it’s 4 days per week. We either took Wednesdays off for a break mid-week, or Fridays off for an easy end of the week. I hope this helps.
FYI - as the years progress (I believe beginning in Saxon Math 2) the students do a lesson every day (if not Saxon 2, then definitely Saxon 3!)