disappointed vs nonpositive

disappointed

adj
  • Expressing or indicating disappointment. 

  • Defeated of expectations or hope; experiencing disappointment; let down. 

  • Having had a marriage proposal rejected. 

nonpositive

adj
  • Not positive. 

  • Not positive; either zero or negative. 

noun
  • Any value that is not positive. 

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