Ways to count how many times a word occurs?

[grumblid]

I know that when you're on an individual document and press Ctrl+F, you can specify a word to see how many times it occurs. But I have an odd situation where I want to see how many times a word occurs in entire folder full of documents (some with their own sub-folders) so I don't have to Ctrl+F each one and add to the total number; document by document.



Is there a way to do this, or do I pretty much have to do it the way I mentioned?

This isn't the word, but here's a similar example to mine: Say the word was "OKAY!" Case-sensitive and has to have the exclamation mark at the end.

Thanks for any help with my odd question!