boar vs tusker

boar

noun
  • A wild boar (Sus scrofa), the wild ancestor of the domesticated pig. 

  • A male bear. 

  • A male pig. 

  • A male boar (sense 1). 

  • A male guinea pig. 

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 boar and tusker occurred in a corpus of books? (source: Google Ngram Viewer )