memory stick vs picture card

memory stick

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

  • 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. 

picture card

noun
  • A flash memory card for a digital camera. 

  • 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. 

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