I remember it beineb 1% per year so it will take 100 years to disapear completly (50 for heresies) which sucks Big time!After enforcing a vassal's religion, giving them 100 liberty desire, how long does it last, or how fast does it tick down?
nowadays I only enforce religon with vassals Inintend to feed beyond their ability to pay for all their forts, states and troops.
maybe they are rebelious but that way they cant afford a idependance war and evntually all the Land I gift to them reduces the liberty desire that much that I can placate them until they are loyal again.