fruit fly vs grasshopper

fruit fly

noun
  • any insect of the Tephritidae family, whose larvae damage plant tissue. 

  • any insect of the Drosophilidae family, whose larvae feed on ripening fruit, especially the species Drosophila melanogaster that is used in genetic research. 

  • A woman who enjoys the company of homosexual men; a "fag hag". 

grasshopper

noun
  • In a looser sense, also includes the katydids (also known as longhorned grasshoppers or bush crickets), which are members of the family Tettigoniidae, of the suborder Ensifera. 

  • In the strict sense, refers to insects in the suborder Caelifera, particularly those in the family Acrididae. 

  • A mostly herbivorous insect of the order Orthoptera, noted for its ability to jump long distances and for the habit of some species communicating by stridulation; they are related to but distinct from crickets. 

  • A cocktail made with crème de menthe and optionally with crème de cacao. 

  • A young student in initial stages of training who has been chosen on account of their obvious talent. 

  • In ordinary square or upright pianos of London make, the escapement lever or jack, so made that it can be taken out and replaced with the key. 

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