Which version are you on?
I believe that you can use the event tracking after version 22.214.171.124. However, I am not 100% sure, so can someone confirm this?
Another way is to use the web analysis logs.
I don't think WebAnalysis has a usage tracking. Or I might have overlooked at it.
Did you tried looking at the WebAnalysis logs after using even tracking (I know that you have it already on for FR )
I checked the log file WebAnalysis but it does not have any entry helpful for usage tracking
We are in version 126.96.36.199