fruit fly vs greenfly

fruit fly

noun
  • 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". 

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

greenfly

noun
  • especially, Myzus persicae, green peach aphid 

  • Certain aphids (Aphidoidea), commonly known as greenfly in Britain and the Commonwealth 

  • Lucilia sericata, common green bottle fly 

  • Odontomyia chloris (syn. Musca chloris) 

  • Tabanus nigrovittatus, a biting horsefly more commonly known as the greenhead horsefly, greenhead fly, or greenhead 

  • Any of several kinds of common insects green in color 

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