BSW: A dozen?
ISO: ~5000 (up to lvl 40 when I used to be more competitive)
Goko/MF: ~2000
IRL: Not that many compared to online, somewhere in the 10s
Total: Let's round it up and make it 8000, accounting for some lost data / unranked games / 3p games, etc.
Currently I play about 2 to 5 games per day on average.