Hello Alexander
I'd like a sort of "pareto" (the top fifth of the whole set of words sorted by usage/frequency) "index of words" which are in the .org documents . Then, in some of the agenda views that look for the string that you type, you'd be offered word expansion on those frequent word set, just like you're offered word expansion on TODO/DONE and the like. Let's say that somehow it's a starting point for a self learning helper.
Possibly not big deal if well thought of. Possibly of great coolness as Bastien told. :-)
best
Haroldo