impending vs paraenesis

impending

noun
  • Something that impends or threatens; an expected event. 

adj
  • Approaching; drawing near; about to happen or expected to happen. 

paraenesis

noun
  • A warning of impending evil. 

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

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