I assume you mean multiple people. I haven’t had the experience with people very close to me, but I have friends who have lost multiple people suddenly in their life. One friend lost 5 or 6 friends and relatives and their dog all in two years time. their mom, a cousin, and I don’t remember the other relationships, but they were all siginficant. There was a lull for barely over a year and then just recently his SIL had a cardiac event and needed surgery within two days of being hospitalized, but last I heard she was doing well. Still, that family has had a lot of scary health issues and death. Most of the death has been sudden.
I also know more than one person who lost both of their parents within several months of each other. They help make up that statistic I guess. My neighbor lost both of her parents within 3 months of each other, I knew them both. Her mom had become ill and had less than a year to live. Then her dad suddenly died, and her mom a few months later. Actually, her husband had lost his own father less than a year before, so as a couple it was a lot of loss, although his dad was not very sudden.
My family historically has sudden death. That’s what you used to get if your family is predisposed to heart disease and mine is. My maternal great grandfather dropped dead at 38 on the dancefloor at a wedding. His two sons died in their late thirties and forties fairly suddenly from heart disease. The one who lived into his 40’s had one cardiac event he lived through, but then dropped dead suddenly a few years later. My paternal grandmother dropped dead from a heart attack at a young age also. I had thought it was in her forties, but my sister thinks she was in her early fifities. Still young.