I reckon if I'm lucky I'll get 10 games averaging around 3.5 overs per game based on recent performances. My last club which was a spinners paradise might have averaged around 6 overs a game. Similar to you SLA I have a patch of grass in a little paddock 60 metres (if that) from my house, I roll it, cut it and maintain a wicket there and can go over there any time I wish and have a bowl. I have in the past spent hours over there bowling, but last year I tended to go over and bowl 40-60 balls and stop at that. Currently I'm feeling as though rest over the winter has done more good than bad and I may adopt a lesser approach to practicing to avoid injury.
I normally do about 30 games a summer, averaging about 3 overs in T20s and 6-7 overs in league games.