credit card vs greeting card

credit card

noun
  • Any type of bank card. 

  • A plastic card, usually with a magnetic strip or an embedded microchip, connected to a credit account and used to buy goods or services. 

greeting card

noun
  • A card, typically folded in half and available commercially, that is sent to someone as a greeting. (This entry is a translation hub.) 

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