accusation vs exoneration

accusation

noun
  • The act of accusing. 

  • A formal charge brought against a person in a court of law. 

  • An allegation. 

exoneration

noun
  • An act of disburdening, discharging, or freeing morally from a charge or imputation. 

  • The state of being disburdened or freed from a charge. 

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