arraign vs impeach

arraign

verb
  • To officially charge someone in a court of law. 

  • To call to account, or accuse, before the bar of reason, taste, or any other tribunal. 

noun
  • Arraignment. 

impeach

verb
  • To bring a legal proceeding against a public official. 

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

  • 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 arraign and impeach occurred in a corpus of books? (source: Google Ngram Viewer )