waltz vs war dance

waltz

noun
  • A ballroom dance in 3/4 time. 

  • A piece of music for this dance (or in triple time). 

  • A simple task. 

verb
  • To dance the waltz (with). 

  • To move briskly and unhesitatingly, especially in an inappropriately casual manner, or when unannounced or uninvited. 

  • To move with fanfare. 

  • To accomplish a task with little effort. 

war dance

noun
  • A ceremonial dance performed before a major battle or after a victory, usually by a tribe. 

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