gnat vs johnny

gnat

noun
  • An annoying person. 

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

johnny

noun
  • An inexperienced new worker, usually an immigrant. 

  • A condom. 

  • A hospital gown: a gown with a back opening closed with snaps or ties, worn by hospital patients. 

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