backbiting vs green-eyed monster

backbiting

noun

  • The action of slandering a person without that person's knowledge. 

adj

  • Slanderous or speaking badly, especially of a person without that person's knowledge. 

green-eyed monster

noun

  • Envy, jealousy, covetousness. 

How often have the words backbiting and green-eyed monster occurred in a corpus of books? (source: Google Ngram Viewer )