damselfly vs mosquito hawk

damselfly

noun
  • Any of various insects of the suborder Zygoptera that have long slender bodies, and are similar to dragonflies but having wings folded when at rest. 

mosquito hawk

noun
  • A crane fly (US) / daddy longlegs (UK), a large, mosquito-like insect in the suborder Tipulomorpha 

  • Any of various species of dragonfly of the genus Micromidia, endemic to eastern Australia. 

  • A dragonfly. 

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