free pass vs freedom

free pass

noun
  • An exemption from normal processes. 

  • An intentional walk. 

  • A document entitling the bearer to free transportation. 

freedom

noun
  • The right or privilege of unrestricted use or access 

  • The lack of a specific constraint, or of constraints in general; a state of being free, unconstrained. 

  • Frankness; openness; unreservedness. 

  • The state of being free, of not being imprisoned or enslaved. 

  • Improper familiarity; violation of the rules of decorum. 

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