couthie vs genteel

couthie

adj
  • Friendly, agreeable, pleasant. 

genteel

adj
  • Polite and well-mannered. 

  • Stylish or elegant. 

  • Aristocratic. 

  • Affectedly proper or refined; somewhat prudish refinement; excessively polite. 

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