couth vs man of the world

couth

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

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

adj
  • Agreeable, friendly, pleasant. 

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

  • Comfortable; cosy, snug. 

man of the world

noun
  • A worldly or sophisticated man, one well versed in the ways and dealings of humankind. 

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