Concordance question

["Yo Intl." rrr@xxxxxxxx]

Here is something else I have been wondering about for some time: Being in
the text crunching business, I sometimes find it useful to look at a text
and see what words appear with what frequency.

I wonder if XYwrite has a concordancer built in, or if something like this
could be (or has been) programmed?

Tia

-- Rene von Rentzell, Tokyo 
-- "Whenever people agree with me, I always feel I must be wrong." (Oscar Wilde)