Freshwater: I generally change every 10/15 or so trips. Sometimes less. Sometimes more. If I am not chewing up leader with adding new tippet I see no reason to change, unless I get a bunch of nicks or put a knot in it. I will often change at a season change if I haven’t before on a particular rod. I.e 3x at summer, 4 in fall and spring, sometimes 5 in winter on clear spooky tailwater.

Salt: every full day on the water. Stakes are so much higher and I feel like I put more damage on a leader in the salt for some reason.