indulgence vs unhappiness

indulgence

noun
  • An indulgent act; a favour granted; gratification. 

  • A pardon or release from the expectation of punishment in purgatory, after the sinner has been granted absolution. 

  • The act of catering to someone's every desire. 

  • The act of indulging. 

  • Tolerance. 

  • A wish or whim satisfied. 

  • Something in which someone indulges. 

verb
  • to provide with an indulgence 

unhappiness

noun
  • The feeling of not being happy 

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