disinterest vs unfairness

disinterest

noun
  • The absence of interest (bias or stake). 

  • An absence of interest (attention or curiosity). 

verb
  • To render disinterested. 

unfairness

noun
  • An unjust act or situation. 

  • The state of being unfair; lack of justice. 

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