You leave your home as usual one morning and never return because you died. How often does that happen to people? Die away from home?

I imagine it happens to most people.

It happens to many people.

Wlllful killing, and suicides, are thankfully still fairly rare causes of death by population, but fatal accidents and illnesses are common.

I don't know the proportions, but very many people die in hospital or hospice, so you could count those in your question.