Search word count

I take the occasion of the very nice update in the graphical representations to ask about the possibility of improving the search term report. The simple list of search terms sorted in reverse chronological order, which is the current report, is helpful, but I think we can do much better. What would be really useful is an analysis of the trends in search terms. Now, I realize that this can be a very complicated thing to do, given that the search strings might often resemble each other, but are often slightly different, and are increasingly long-tailed. Perhaps if you gave the user the chance to list the terms to be analyzed and the unit of measure (by day, by week, by month, etc.), then you could fairly easily show the trends