agreeableness vs douceur

agreeableness

noun
  • The quality of being agreeable or pleasing; that quality which gives satisfaction or moderate pleasure to the mind or senses. 

  • Resemblance; concordance; harmony. 

  • A personality trait characterized by the adjectives kind, sympathetic, cooperative, warm and considerate. 

  • The quality of being agreeable or suitable; suitableness or conformity; consistency. 

douceur

noun
  • Sweetness of manner: agreeableness, gentleness. 

  • A tax break provided as an inducement to sell valuable items (especially art) to public collections rather than on the open market. 

  • A sweetener: a gift offered to sweeten another's attitude, a tip or bribe. 

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