Easily to be honest. But we're all different and the key is to understand what we can do mentally and physically. Also depends on standard. Doing 2 step 5 games would be possible but I wouldn't be physically or mentally able to guarantee that I wouldn't be hindered so I wouldn't do that (wouldn't happen anyway). But 2 lower league OA games, wouldn't even give it a second thought other than its good for my fitness and a few quid in the pocketl.I could not do more than one OA game in a day, I don't know how people do that.
I could do two games a weekend but I coach a youth team on Sundays so it's one for me, which is quite enough. I often do a midweek game too.
The initial question shouldn't be asked as those answering are from too wide a spectrum. The question should only be "how many games as I currently capable of doing?" And that question can only be answered by the person asking it