memory stick vs trading card

memory stick

noun
  • A portable solid-state electronic flash memory data storage device equipped with a USB (or similarly specified) plug for direct connection to a corresponding port; a USB drive, thumb drive or pen drive. 

  • One of a series of memory devices manufactured by the Sony Corporation ranging in size from a USB drive down to a flash card. 

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