human chain vs prance

human chain

noun
  • A form of demonstration in which people link their arms as a show of political solidarity. 

  • A bucket brigade. 

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 human chain and prance occurred in a corpus of books? (source: Google Ngram Viewer )