fruit fly vs praying mantid

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". 

praying mantid

noun
  • praying mantis (insect) 

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