My maintenance shedule does not note that the PCV valve needs to be replaced. What is a suitable interval? I have 60,ooo km (37,000 miles) on the clock

I take it on the 2AZ-FE the PCV valve is on the passenger side coming into the valve cover at the back of the cover? (not sure). anyone with photos?
2002 Toyota Camry 2.4L - Castrol GTX HM 15w-50
2005 Toyota Camry 2.4L - Mobil Super Synthetic 5w-30