fruit fly vs ladybug

fruit fly

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

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

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

ladybug

noun
  • Synonym of ladybird. 

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