impugn vs outrage

impugn

verb
  • To verbally assault, especially to argue against an opinion, motive, or action; to question the truth or validity of. 

outrage

verb
  • To cause or commit an outrage upon; to treat with violence or abuse. 

  • To inspire feelings of outrage in. 

noun
  • The resentful, indignant, or shocked anger aroused by such acts. 

  • An excessively violent or vicious attack; an atrocity. 

  • An offensive, immoral or indecent act. 

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