No it isn't (pretty sure you're on a wind up, but...)
Sat, Sun, Mon,Tue, Wed, Thu, Fri, Sat is 8 x 24 hours (i.e. 8 days)
so Sat-Tue-Sat is 3 games in 8 days
8 days isn't a week.
If you only play on Saturdays, you play once a week.
If you then play on one extra day (Tuesday), you play twice...