R12 How to know whether particular OAF page is accessed?

Hello Everyone,

I have a requirement where we need to end date responsibilities based on last usage, let me illustrate with example.

User1 is having 1000 responsibilities assigned to him and out of which in last 3 months he have only accessed 20 responsibilities so now we want to end date remaining 980 responsibilities, how to achieve same?

User2 (only OAF page users) is having 10 responsibilities assigned to him and out of which in last 2 months he have only accessed 2 of his responsibilities so now we want to end date remaining 8 responsibilities including OAF pages access like (iexpense, workflow administrator or customer/supplier OAF pages)