dak vs first class

dak

noun
  • A post system by means of transport relays of horses stationed at intervals along a route or network, carrying mail and passengers. 

  • A dak bungalow. 

verb
  • To suddenly pull down someone's pants as a prank; to pants. 

first class

noun
  • the third year of primary school, following after the junior and senior infant levels. 

  • premier rank. 

  • One of two classes of city government in the U.S. state of Kentucky, in which cities elect a mayor and aldermen. 

adj
  • Of, or relating to the most luxurious and expensive class of accommodation on a train, ship, hotel, etc. 

  • Great, very enjoyable. 

  • Of, or relating to a first class match. 

  • Belonging to the best or top group in a system of classification. 

  • Of, or relating to a class of mail to be delivered before second class. 

  • Of, or relating to a treatment like that for a first-class citizen. 

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