cooter vs skipjack

cooter

noun

  • A freshwater turtle of the eastern United States of the genus Pseudemys. 

  • Vagina or vulva. 

  • The box turtle. 

  • A redneck. 

skipjack

noun

  • Several of the genus Euthynnus resembling tuna. 

  • The runner. 

  • Katsuwonus pelamis. 

  • The bonito 

  • The threadfish. 

  • The cutlass fish 

  • The saury. 

  • A shallow sailboat with a rectilinear or V-shaped cross section. 

  • The alewife 

  • The common bluefish 

  • The butterfish 

  • The leatherjacket, leatherjack (genus Oligoplites) 

  • The saurel. 

  • An elaterid; a click beetle. 

  • The jurel 

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