free pass vs indulgence

free pass

noun
  • An intentional walk. 

  • An exemption from normal processes. 

  • A document entitling the bearer to free transportation. 

indulgence

noun
  • The act of indulging. 

  • 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. 

  • Tolerance. 

  • A wish or whim satisfied. 

  • Something in which someone indulges. 

verb
  • to provide with an indulgence 

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