It's a pretty basic implementation, in that it will only list the macro usage shown in the Engine Log's current state, rather than since 'the beginning of time'. Still, it gives a decent indication of the most frequently used macros.
I got frustrated by the inability to see this data easily, so I wrote a full-blown macro tracker that will track any macro you want—and not track the ones you don't want.
It's not as accurate as using the log, of course, but I wanted something that I controlled (and that was formatted in a way I found more readable).
