carnet vs chitty

carnet

noun
  • An admission pass. 

  • A ticket book, a collection of tickets in the form of a booklet often sold at a discount to single tickets. 

  • A customs document that allows the temporary duty-free importation of a particular article 

chitty

noun
  • a small note, such as a pass or voucher slip; a chit. 

adj
  • childish; like a baby 

  • full of chits or sprouts 

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