laissez-passer vs season ticket

laissez-passer

noun
  • A pass or permit; a document permitting the bearer to travel, sometimes issued as an emergency passport. 

season ticket

noun
  • A ticket that is valid for multiple rides (limited by number of rides and/or time of travel) by public transit for which individual tickets would otherwise be needed. 

  • A ticket that is valid for all of the events in a series of related events for which individual tickets would otherwise be needed. 

How often have the words laissez-passer and season ticket occurred in a corpus of books? (source: Google Ngram Viewer )