can a notmuch query filter the output based on the size of a thread?

[Jameson Graef Rollins]

On Mon, Nov 11 2019, Daniel Kahn Gillmor <dkg at fifthhorseman.net> wrote:
> Over on https://github.com/pazz/alot/issues/1449, a user asks:
>
>>  I would like to query for `mailcount`, for example
>>  to search for mails on a mailing list which got answered 
>>  `:search tag:list/questions and mailcount>1`
>>  or
>>  `:search tag:list/questions and not mailcount:1`
>
> This seems like a question for notmuch (and maybe for xapian).  I don't
> know how to do it off the top of my head.  Any takers?

I'm not sure I understand what the question is.  They want to count
messages, i.e. "notmuch count"?