I created a script to get word usage info from the sentence files in the voice-web repository:
It’s an easy way to spot misspelled words and words that need more coverage. You can also link it to a dictionary and it will tell you which dictionary words don’t exist in the corpus.
This is interesting, we might want to have something similar in the future in our site as “advanced stats”.
Thanks for this! 
This is really useful! Thank you.
Do you know whether the folder https://github.com/mozilla/voice-web/tree/master/server/data/en really includes all of the existing sentences? What about for example all those old sentences from The Alchemist? They don’t seem to be there - or have I missed them?
The Alchemist, Flickr image descriptions and a bunch of others are no longer part of the repo. But you can find them if you go back to around December 2017.
I designed it to just read one file because I’m assuming that everything will be passed through Sentence Collector eventually and those extra files will no longer be needed.
The repo is now called cvtools and contains a new script to validate sentences.