salutation vs sympathy card

salutation

noun
  • The act of greeting. 

  • A greeting, salute, or address; a hello. 

sympathy card

noun
  • A greeting card sent to family members of one who has died to express regret. 

  • An attempt to score points in a discussion by portraying oneself as a victim in need of sympathy (used with the verb "play"). 

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