A lot. Grew up in one house, but we summered about 100 miles from where we lived, in about a half dozen different bungalows for three months at a time (paying rent on the bungalows), so I’d say 7 places, ages 0-17.
Then I went to college, so 4 dorm rooms plus 3 summer residences when the dorms were closed, plus I rented a different dorm room over winter break one time, so that’s 8 more, ages 18-21, for a running total of 15.
Then I lived in a variety of apartments, 4 of which I paid rent on (as opposed to “crashed in for a week or two”), so that brings me up to 19, from ages 22-27.
Then I went to grad school for 8 years in 3 different cities, living in 4 different apartments and dorms, so that’s 23 places, ages 28-35.
Then (married now) I lived in two places, ages 36-39.
Divorced, I lived in a series of 3 hellholes, ages 40-42, bringing me up to 28.
Then I bought a co-op, sold it and bought another one, ages 42-45, so that’s 30.
Then I sold my co-op, and bought a condo and retired at age 66, so that’s 31 (25 not counting the bungalows). Nearly one for every two years I’ve lived.