abolition vs free pass

abolition

noun
  • The ending of convict transportation. 

  • The state of being abolished. 

  • The act of abolishing; an annulling; abrogation. 

  • The ending of the slave trade or of slavery. 

free pass

noun
  • A document entitling the bearer to free transportation. 

  • An exemption from normal processes. 

  • An intentional walk. 

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