file card vs memory card

file card

noun
  • A card used as part of a file system. 

  • A tool for removing debris from between the teeth of a file. 

memory card

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

  • A personal computer's expansion memory module that fits in a standard interface such as a PCI or ISA slot. 

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