couth vs savoir faire

couth

adj
  • Agreeable, friendly, pleasant. 

  • Marked by or possessing a high degree of sophistication; cultured, refined. 

  • Comfortable; cosy, snug. 

noun
  • Social grace, refinement, sophistication; etiquette, manners. 

  • A person with social graces; a refined or sophisticated person. 

savoir faire

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