Not really sure what you're trying to ask but I'd say there's no minimum time. I went through a month not so long ago where I didn't finish down once and I played every night except 3. I then went on a losing run where I didn't get any hands or when I did I was getting bad beats. I lost a lot of money in that run, but that's the game. I was still up overall which is what counts.
I don't think I could play for only 10 minutes, although I do tend to get a good hand the first time I sit down so who knows.
