calumny vs hit piece

calumny

noun
  • Falsifications or misrepresentations intended to disparage or discredit another. 

  • A false accusation or charge brought to tarnish another's reputation or standing. 

verb
  • To make false accusations or levy false charges against a person with the intent to tarnish that person's reputation or standing; to calumniate. 

hit piece

noun
  • A published article or post aiming to sway public opinion by presenting false or biased information in a way that appears objective and truthful. 

How often have the words calumny and hit piece occurred in a corpus of books? (source: Google Ngram Viewer )