orca vs tautog

orca

noun
  • A sea mammal (Orcinus orca) related to dolphins and porpoises, commonly called the killer whale. 

tautog

noun
  • A fish of the wrasse family found in salt water off of eastern North America from Nova Scotia to South Carolina (Tautoga onitis). 

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