blame vs impeach

blame

verb
  • To censure (someone or something); to criticize. 

  • To assert the cause of some bad event. 

  • To assert or consider that someone is the cause of something negative; to place blame, to attribute responsibility (for something negative or for doing something negative). 

noun
  • Culpability for something negative or undesirable. 

  • A source control feature that can show which user was responsible for a particular portion of the source code. 

  • Censure. 

  • Responsibility for something meriting censure. 

impeach

verb
  • To charge with impropriety; to discredit; to call into question. 

  • To bring a legal proceeding against a public official. 

  • To hinder, impede, or prevent. 

  • To demonstrate in court that a testimony under oath contradicts another testimony from the same person, usually one taken during deposition. 

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