satire vs trenchancy

satire

noun
  • A satirical work. 

  • A literary device of writing or art which principally ridicules its subject often as an intended means of provoking or preventing change or highlighting a shortcoming in the work of another. Humor, irony, and exaggeration are often used to aid this. 

trenchancy

noun
  • Irony or bitterness of tone. 

  • The quality of being trenchant. 

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