Document Information/Time spent on document

Hi all,

The school I work for in Tennessee is a 1:1 laptop school, PK-12th grade. A high school English teacher has asked me if there is a way in Pages to see just how long a student has spent time on said document("Suzy, you spent 4 minutes on a 2 page paper?", must have copied/pasted). I have looked in Inspector in the Document tab and see the Info tab, and I know about the Get Info on a file, but nothing states a time. I have heard Word gives this information. Any ideas in Pages?

Thanks for any help.