amnesty vs exoneration

amnesty

noun
  • An act of the sovereign power granting oblivion, or a general pardon, for a past offense, as to subjects concerned in an insurrection. 

  • Forgetfulness; cessation of remembrance of wrong; oblivion. 

verb
  • To grant a pardon (to a group) 

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 amnesty and exoneration occurred in a corpus of books? (source: Google Ngram Viewer )