How to show amount of times a report has been run?

Summary:

The 'OTBI usage real time' subject area can't show usage of reports - how to report on this?

Content (please ensure you mask any confidential information):

We have a number of reports created without using subject areas, but created in BI Publisher using a data model instead. I can't see any way to use the 'OTBI usage real time' subject area to report on the usage of these reports, but is there another way?

I'm interested in learning different aspects of the usage like amounts of time generated pr. report in total, which users generated them, how many times each user generated them, which legal entities they are hired in etc.