business card vs greeting card

business card

noun
  • A small card with a person's name and professional information (such as occupation, business phone number, e-mail address, etc.). 

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 business card and greeting card occurred in a corpus of books? (source: Google Ngram Viewer )