Never a time frame exactly we would work together on ideas based off of what we both wanted.
Sometimes he would come to the table with a game idea and we would work on that for a while.
Sometimes he would say he wants to bust out a game in 1 day maybe 2, if possible.
Sometimes I would have a project I would have been working on for a while and I would just ask for some artwork to put over my game in return.
I always would want my artwork in a few days, but he wouldn't start working on the art til the game was near finished most of the time.
Not always but sometimes he'd like a game programmed in a few days, unless it was a big game,.
Our big games generally took about a month each to build. The more we made games the better we got at optimizing code and well everything.
I wouldn't recommend spending over 2 months on a game at most, especially when you are starting out, this will feel like an eternity if you are like me.