brood sow vs shoat

brood sow

noun
  • A female pig kept for breeding. 

  • A woman raising children. 

shoat

noun
  • A young, newly-weaned pig. 

  • A geep, a sheep-goat hybrid (whether artificially produced or the result of animals from these species naturally intermating). 

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