chuffed vs unhappy

chuffed

adj
  • Very pleased or satisfied; delighted. 

  • Displeased; gruff. 

unhappy

adj
  • Not happy; sad. 

  • Not satisfied; unsatisfied. 

noun
  • An individual who is not happy. 

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