cheerful vs disappointed

cheerful

adj
  • Bright and pleasant. 

  • Noticeably happy and optimistic. 

disappointed

adj
  • Expressing or indicating disappointment. 

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

  • Having had a marriage proposal rejected. 

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