IMHO there's no need for such a function. Even programs that are build especially for writing like writer or word do not have such an option.
If someone wants to analyze text in special ways he has to ask for a solution in a forum for e.g. JavaScript or PHP. Then he can write a script to do his analysis within pspad. -- <https://forum.pspad.com/read.php?2,71464,71473> PSPad freeware editor https://www.pspad.com
