Events have a 20% chance of happening every 46 minutes. Also until Bonemass is defeated, you can't get any event outside of your base (base means at least 3 objects within 40 meters) so not screwing around too much in your base is enough to siginifcantly reduce the number of events.
Alternatively quitting out once every 45 minutes should also work. If you are worrried about not keeping track of time while playing then quit out once per in-game day (one day is 30 minutes).