disinterested vs unfair

disinterested

adj
  • Having no stake or interest in the outcome, and no conflicts of interest; free of bias, impartial. 

  • Uninterested, lacking interest. 

unfair

adj
  • not fair, unjust 

  • sorrowful; sad 

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