practical joker vs sympathy card

practical joker

noun
  • someone who instigates practical jokes 

sympathy card

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

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

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