Isn’t the number of “paragraphs” simply the number of files then?
OP did not ask for paragraph count.
Correct. I was merely commenting on that, not supplying any kind of “solution” for it.
<run of non-periods><period> is not a great definition of a sentence due to false positives with decimal numbers.… among other things.
We know this… I was wanting the OP to try the solution and point this out, at which time we would explain that they are pretty much asking for an impossible task…at least with what Notepad++ can do.
However, if the need is not for a 100% exact count, but possibly one that is somewhat close, simple algorithms might work.