IT can make a list of the most frequently used words and phrases in your transcription. You select the folder of files you want Instant Text to "read" through and in a few seconds your list is done.
Instant Text also includes a number of glossaries ready to be used. See link:
http://www.textware.com/itfeature/glossary2page.htm
I guess that is what you are looking for. If you have any questions you can email me.