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
2005 Toyota Camry 2.4L