My Shakespeare teacher in college called it a concordance when we studied Macbeth. There was a full concordance and then concordances for each speaking part. Pretty fascinating stuff.

I’ve always just seen it called a frequency table.

You looking for word frequently count?

Shot in the dark but maybe you’re thinking of word2vec?

sometimes it’s called bag of words

Word Trends is what this software called them. I always wondered how they know how many times fuck is used in a book, I had hoped they didn’t have to count. https://www.maxqda.com/help-mx22/visual-tools/word-trends-analyze-frequencies-of-words-within-a-text