How to track my Facebook usage?

[Muhammad]

Hello everyone,

A week ago, I decided that I will reduce my usage of Facebook to zero because I waste a lot of time browsing it and that affects my studies. I want a way to track how much time I consumed browsing Facebook during the last few days or the last week in comparison to the days before that week. I mean something like that's of Google where you know how much people use a certain website among a time span.

Thank you in advance, and your help will be much appreciated.