Frequently used pages

I have made a simple Intranet software for my employer. They need to add a new feature as “Frequently used Pages/sites”. My Intranet does not work per user and all users can see the same pages. For example, as in some Intranet softwares, users do not have their own calendar, tasks, shared project lists, etc. I use ASP and Javascript for my codes. How can I add “Frequently used Pages/sites” button or link or section to the Intranet? Any help would be appreciated.