I'm ran the latest draft of my book through a word-frequency count. 47 uses of "simply"?! That's simply too many, and I got that down to 11 (mostly just by deleting them--it's interesting how often "simply" simply isn't needed). Now I'm working on "certainly," "of course," and "actually." It's very easy to fall on such linguistic crutches when you're writing.
So the total number of different words in my new book is about 4,900 (out of 30,000 words).
I don't know why I find that interesting. I also wondered if it's a lot or a little.
Turns out I'm not the only one curious about such matter (oh, the world wide webs, how magic you are!).
Zachary Booth Simpson was all over this, ten years ago.
Compared to most books, I don't use many words at all (that's good news for my friend, Gotti).
Moby Dick uses 17,227 different words. But Moby Dick is long. And my book is short. It turns out that for books of my length, my vocabulary seems perfectly respectable.