When I was shooting competition I had a set of springs and would change them based on the nature of the shoot. Other than that I don’t think I replaced any for over a year.
With my semi-autos I change them when I can notice a difference in recoil and/or performance. It seems my mag springs wear faster than the recoil springs. In my 1911s I use Wilson flat springs and they seem to last longer.
When I was shooting competition I had a set of springs and would change them based on the nature of the shoot. Other than that I don’t think I replaced any for over a year.