It really depends on the club. I primarily use my 56 Vokey, so it gets replaced at least every other year. Gap wedge (50 degree Vokey) is next at 2.5 yrs typically (with more full swing shots, it's easier to see the gap wedge's performance start to drop off). Last is usually the loft wedge (60 degree Vokey) due to me not using it as much as the other 2.