Well basically i didn't like much games. I played only 1 which took me around same as u say 4-5 min. But then my score was like 900 and i opted for 6000 in Score Sender, So i basically added approx time depending on it.
May be i could be wrong in calculation but i thought being a little high is OK then being a pretty low and risking account..
Lots of time i am getting message of logged out. I have tried twice with 15 min as interval to test and it got be logged out. When tried with small interval of 5-8 minutes it worked fine and great..
Would be good if somehow you could fix the problem of logging out as now it is tempting me to set a small time...
Thanks For the guide anyway. Its great.