I recently wrote a computer program that produces a list of the words in a story in order of most frequent to least frequent and how many times they appear. I've started using it to look at my stories for overuse of words like "again," "however," "orgasm," and "cooter." Okay, I'm kidding about "cooter."
It skips the pronouns, conjunctions, etc. so you can see the "meaty words."
As of this writing, I only have a binary for Ubuntu 18.04, but I'd be happy to share the source code or port it to other platforms if people want to use it. Also, you could just DM me your story and I'll send you back the histogram.