Is it a good idea to manage personal knowledge on the basis of activity and inactivity/repetitive-activity?

undesired action -> concept mismatch -> activity

It is a good idea to keep a journal in this case. This way you can track what you are being requested to know. This will tell you if you have active gap in what you need to know for your personal or professional life. Once you know that you can start learning what is missing.

I don't think I understand what you're asking here.