flashcard vs memory cartridge

flashcard

noun
  • A solid-state digital memory storage format, commonly found on computers, digital cameras and cellphones. 

  • A card used to aid rote memorization. One side of the card contains data of one kind, or a question, and the other side contains the associated response which one wants to memorize. For example, one side could contain an English word, and the other side the Spanish translation. 

memory cartridge

noun
  • An electronic flash memory data storage device commonly used in portable electronic devices. 

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