dragonfly vs hornet

dragonfly

noun
  • An insect of the suborder Epiprocta or, more strictly, the infraorder Anisoptera, having four long transparent wings held perpendicular to a long body when perched. 

hornet

noun
  • A large wasp, of the genus Vespa, having a brown-and-yellow-striped body and the ability to inflict a serious sting. 

  • A person who pesters with petty but ceaseless attacks. 

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