northern raven vs prey

northern raven

noun
  • A common raven, Corvus corax. 

prey

noun
  • That which is or may be seized by animals or birds to be devoured 

  • A person or thing given up as a victim. 

  • A living thing that is eaten by another living thing. 

  • The victim of a disease. 

verb
  • To act as a predator. 

How often have the words northern raven and prey occurred in a corpus of books? (source: Google Ngram Viewer )