accuse vs exculpate

accuse

verb
  • to find fault with, blame, censure 

  • to make an accusation against someone 

  • to charge with having committed a crime or offence 

exculpate

verb
  • To clear of or to free from guilt; exonerate. 

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