confident vs sad

confident

adj
  • Self-assured, self-reliant, sure of oneself. 

  • Very sure of something; positive. 

sad

adj
  • Unfashionable; socially inadequate or undesirable. 

  • Soggy (to refer to pastries). 

  • Causing sorrow; lamentable. 

  • Of colours: dark, deep; later, sombre, dull. 

  • Appearing sorrowful. 

  • Feeling sorrow; sorrowful, mournful. 

  • Poor in quality, bad; shameful, deplorable; later, regrettable, poor. 

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