picture card vs trading card

picture card

noun
  • A playing card which has a picture on it (usually Jack, Queen or King (coat card), but sometimes including Ace or Joker). 

  • A trading card/trade card. 

  • A flash memory card for a digital camera. 

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 picture card and trading card occurred in a corpus of books? (source: Google Ngram Viewer )