linux how to count 50 words in file - SERP Analysis

https://unix.stackexchange.com/questions/398413/counting-occurrences-of-word-in-text-file

https://stackoverflow.com/questions/58986014/counting-number-of-different-words-in-a-txt-file-in-bash

https://www.baeldung.com/linux/word-count-file

https://www.networkworld.com/article/972054/counting-and-modifying-lines-words-and-characters-in-linux-text-files.html

https://askubuntu.com/questions/351326/how-do-i-list-word-count-in-multiple-files

https://superuser.com/questions/59833/how-to-count-the-number-of-occurrences-of-each-word-in-a-file

https://www.tecmint.com/wc-command-examples/

https://community.unix.com/t/how-to-find-a-count-of-a-word-within-a-file/195453

https://www.quora.com/How-do-I-count-the-number-of-unique-words-in-a-file-in-Unix