unconscionable vs unfair

unconscionable

adj
  • Excessive, imprudent or unreasonable. 

  • Not conscionable; unscrupulous and lacking principles or conscience. 

unfair

adj
  • not fair, unjust 

  • sorrowful; sad 

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