paraenesis vs piety

paraenesis

noun
  • Advice or exhortation, particularly of a moral or religious nature. 

  • A warning of impending evil. 

piety

noun
  • A devout act or thought. 

  • Reverence and devotion to God. 

  • A belief that is accepted unthinkingly and with undue reverence. 

  • Similar reverence to one's parents and family or to one's country. 

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