The PCV on our cars is not available on its own; you have to buy the breather plate assembly I noted in my writeup.
My car has nearly 50K miles and when I removed the old PCV, I gave it a vigorous shake, and it rattled pretty much identically to the new one I had.
So, assuming regular oil changes and no dip stick expulsions (PCV stuck open), I'd wager you are fine to long-lifecycle your PCV since I can't find anything in the manual about it being a service interval item.
But, as the breather plate assembly with PCV, hose and gasket is under $30, it's cheap insurance if you suspect it is not functioning at 100% and you want to change it.
Hope that helps,