bird of prey vs vulture

bird of prey

noun
  • A carnivorous bird that hunts for its food, especially one that preys on vertebrates. 

vulture

noun
  • Any of several carrion-eating birds of the families Accipitridae and Cathartidae. 

  • A person who profits from the suffering of others. 

verb
  • To circle around one's target as if one were a vulture. 

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