shoat vs tusker

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). 

tusker

noun
  • An animal, such as a bull elephant or a boar, with large tusks. 

  • A tool used in peat cutting, a type of spade similar to a cascrom. 

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