I am trying to reduce the number of tags by selecting unique tags with a tag count less than some value (say <5). I was trying to use tag:count, but I am beginning to realize that is probably a count of the number of tags for a specific book - not what I am after.

I have tried the Manage Tags function, but the search, searches only for strings within the tags and apparently has no way to search the Count field. I have been through the help pages but can't find anything there.
What I want to do is delete any tags that are used (for starters) on only one book. I can do this manually with the Tag Manager, but with over 10,000 unique tags, this is a monumental task. Can anyone help?
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