Blackjack vs prance

Blackjack

noun
  • A fan of the South Korean girl group 2NE1. 

prance

noun
  • A prancing movement. 

verb
  • To spring forward on the hind legs. 

  • To strut about in a showy manner. 

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