arraign vs exonerate

arraign

noun
  • Arraignment. 

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. 

exonerate

verb
  • To free (someone) from an obligation, responsibility or task. 

  • To free (someone) from accusation or blame. 

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