court card vs trading card

court card

noun
  • A king, queen, or jack/knave card in a standard deck of playing cards. 

  • A postcard measuring approximately 4·75″ × 3·5″, in use mainly in the United Kingdom circa 1894–1902. 

trading card

noun
  • A collectible card, sometimes sticker, usually made out of paperboard or thick paper, which usually contains an image of a certain person, place or thing (fictional or real) and a short description of the picture, along with other text (attacks, statistics, or trivia). There is a wide variation of different types of cards, like sports, cars, natural history, film characters or other information of interest to purchasers. Sometimes is included with tobacco, food or confectionery products. 

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