gnat vs nonentity

gnat

noun
  • An annoying person. 

  • Any small insect of the order Diptera, specifically within the suborder Nematocera. 

nonentity

noun
  • an unimportant or insignificant person 

  • the state of not existing; nonexistence 

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