unequal vs unfair

unequal

adj
  • Not the same. 

  • Out of balance. 

  • Inadequate; insufficiently capable or qualified. 

  • Erratic, inconsistent. 

noun
  • One who is not an equal. 

unfair

adj
  • not fair, unjust 

  • sorrowful; sad 

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