promising vs unhappy

promising

noun
  • The act of making a promise. 

adj
  • Showing promise, and likely to develop in a desirable fashion. 

  • a promising young apprentice 

  • Encouraging and inspiring confidence. 

unhappy

noun
  • An individual who is not happy. 

adj
  • Not happy; sad. 

  • Not satisfied; unsatisfied. 

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