gnat vs midge

gnat

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

  • An annoying person. 

midge

noun
  • any of various small two-winged flies, for example, from the family Chironomidae or non-biting midges, the family Chaoboridae or phantom midges, and the family Ceratopogonidae or biting midges, all belonging to the order Diptera 

  • any bait or lure designed to resemble a midge 

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