Mass delete of unpopular tags
Hi all. I've searched somewhat, but cannot seem to find an answer to this one:
I've got a large collection that I've imported a lot of social metadata for. I've ended up with around 3000 odd tags, the majority (>2500) of which are only applied to a few books. I'd like to delete all unpopular tags, say all those that occur on less than 10 books. I can't find a way to do this though the Calibre UI without clicking "delete tag" 2500 times.
Any suggestion?
Much appreciated.
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