exhortation vs suasion

exhortation

noun
  • The act or practice of exhorting; the act of inciting to laudable deeds; incitement to that which is good or commendable. 

  • Language intended to incite and encourage 

suasion

noun
  • The act of urging or influencing; persuasion. 

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