Notes for all the appereances of a word

Hello,

Wouldn't it be nice to have the option of adding a note to all the occurrences of a word or group of words in a book?

For the moment being, as you all know, you can add a note to a selection you make.

I find it useful to have the same for all the words in the book.

Let's say you are reading a novel with a lot of characters. In order to remember something about one of them, you could add a little information that would be available every time the name of the character appears thru the book.

What do you think?

Thanks,