At 2 hours per session? About 210. My friday usually is just shy of 2 sessions under that mode, and sunday is just over 2, the defunct wednesday was right about 2, and I've had 6 weeks with only one game, and 12 with 3 games...
30 weeks with 2 games, and 4 with no games at all. So (6×2)+(30×4)+(12x6)=(12)+(120)+(72)=204. And several sessions ran over by at least 2 hours. So, call it about 210. Not counting the 12 hours helping my daughter's party set up for an L5R game that failed miserably when one of the players didn't like me being asked to enforce the Character gen rules. Nor the 4 hours online with N helping xem generate characters for my january FTF group.
Make that about 220 total.