brood sow vs vixen

brood sow

noun
  • A female pig kept for breeding. 

  • A woman raising children. 

vixen

noun
  • A female fox. 

  • A malicious, quarrelsome or temperamental woman. 

  • A racy or salacious woman who is sexually attractive. 

  • A wife who has sex with other men with her husband's consent. 

How often have the words brood sow and vixen occurred in a corpus of books? (source: Google Ngram Viewer )