There isn't a built-in function to do this but it would be possible to figure it out
For instance you could build a TOC with just that level and count the paragraphs in the TOC
The field code for a level 1 only TOC would be {TOC \o "1-1"}
You can then change the 1-1 to 2-2 for the second level only etc.

You could also create a macro to return a count of Level 1 paragraphs but that will be a bit more involved

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Andrew Lockton
Chrysalis Design, Melbourne Australia