dragonfly vs tipulid

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. 

tipulid

noun
  • A cranefly 

adj
  • of or pertaining to craneflies (insects of the family Tipulidae) 

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