tusker vs warthog

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. 

warthog

noun
  • A wild pig of the genus Phacochoerus, native to Africa. 

  • A nickname for the A-10 Thunderbolt II air support warplane 

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