beast of prey vs varmint

beast of prey

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

  • A predatory person, savagely cruel and ruthless in their treatment of others. 

varmint

noun
  • A pestering animal such as one that kills or harasses a farmer's livestock or crops. 

  • An obnoxious person or troublemaker. 

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