hortative vs instructive

hortative

adj
  • Urging, exhorting, or encouraging. 

  • Of a mood or class of imperative subjunctive moods of a verb for giving strong encouragement. 

noun
  • A mood or class of imperative subjunctive moods of a verb for giving strong encouragement. 

instructive

adj
  • Conveying knowledge, information or instruction. 

noun
  • A case in the Finnish and Estonian languages. It expresses the means or the instrument used to perform an action. 

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