hit piece vs untruth

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. 

untruth

noun
  • A lie or falsehood. 

  • The condition of being false; truthlessness. 

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