How many times do you save when you're playing?

Interesting question. I have lost progress occasionally because of crashes so I try to save regularly. Saving doesn't depend on actual time but more on in game time or accomplishments. I try to save when my sims completed a certain goal, had something (random) happen that I want to keep or when I finish a step in building, for example a room. I think on average I save about once every sim day when I play in live mode.