laissez-passer vs papers

laissez-passer

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

papers

noun
  • Official documents or identification, as a passport. 

  • cigarette papers 

  • A collection of documents, unpublished writing or correspondence in an archive or library collection. 

  • He lost his papers while travelling and had a hard time getting home. 

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