firman vs season ticket

firman

noun
  • A royal decree issued by a sovereign in certain historical Islamic states, especially by the Sultan of Turkey. 

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 firman and season ticket occurred in a corpus of books? (source: Google Ngram Viewer )