accusation vs bum rap

accusation

noun
  • The act of accusing. 

  • A formal charge brought against a person in a court of law. 

  • An allegation. 

bum rap

noun
  • A false accusation, or an injustice, especially one that leads to imprisonment. 

  • An undeservedly unfavorable portrayal or reputation. 

How often have the words accusation and bum rap occurred in a corpus of books? (source: Google Ngram Viewer )