expository vs hortative

expository

adj

  • Serving to explain, explicate, or elucidate; expositive; of or relating to exposition. 

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. 

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