There are other “alternatives,” depending on what you workflow requires. For example, a number of companies now use WordsFlow or DocsFlow from Em Software (https://emsoftware.com), which lets you link external word processing files to InDesign, so that you can keep editing in Word (or Google Docs) and also in InDesign.

I hope a real scripter jumps in here before too long (we don’t have as many reading here as we used to). There’s also a good scripting forum here:
https://www.facebook.com/groups/639232573329900

Ah! OK, that sounds good.
The grep code \* will search for all asterisks.
The grep code (?<=\d)\* will search for "all asterisks that immediately follow a digit"
The code \d+\K\* will search for "all asterisks that follow a slash followed by one or more digits"
Here is one challenge, though: If you have fractions that can cause problems. For example, these codes do not know the difference between 1/2 and 9/11.

Yeah… the running header feature is somewhat limited. There was a plug-in from in-tools.com called PowerHeaders that provided a lot more control like this, but it hasn’t been updated in years. I keep hoping someone will update it!