SMS vs epistle

SMS

noun
  • SMS — Seiner Majestät Schiff – literally, "His Majesty's Ship" in German; 

  • A ship prefix for a ship in the navy of the Empire of Germany (usually for the period leading to WWI and WWI) 

verb
  • To send a message on a cell phone. 

epistle

noun
  • A letter, or a literary composition in the form of a letter. 

  • One of the letters included as a book of the New Testament. 

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