If you have only lived through one you are at most 17 years old, since otherwise you'd have lived through the recession of 2007-2009 and the Covid one of 2020. Earlier there was one in 2001 and in 1990/91, 81/82, 80, 73-75, 69/70, 60/61, 58, 53, 49 and 45.

Thirteen since WWII or roughly two per decade.