hortative vs how-to

hortative

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

  • Urging, exhorting, or encouraging. 

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

how-to

adj
  • that gives advice or instruction on a particular topic 

noun
  • A brief informal description of how to accomplish a specific task. 

  • A book or other guide describing how to accomplish tasks in a certain field 

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