unequal vs unfun

unequal

adj
  • Not the same. 

  • Out of balance. 

  • Inadequate; insufficiently capable or qualified. 

  • Erratic, inconsistent. 

noun
  • One who is not an equal. 

unfun

adj
  • Not fun. 

noun
  • Lack or absence of fun; funlessness. 

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