endemic vs true bug

endemic

noun
  • An individual or species that is endemic to a region. 

  • A disease affecting a number of people simultaneously, so as to show a distinct connection with certain localities. 

adj
  • Native to a particular area or culture; originating where it occurs. 

  • Peculiar to a particular area or region; not found in other places. 

  • Prevalent in a particular area or region. 

true bug

noun
  • Any of various insects of the order Hemiptera and in particular of the suborder Heteroptera, that are wingless or have two pairs of wings, and have mouthparts adapted for piercing and sucking. 

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