jitterbug vs two-step

jitterbug

noun
  • An uptempo jazz or swing dance which embellishes on the two-step pattern and frequently incorporates acrobatic style swing steps. 

  • A jazz musician or aficionado. 

  • Synonym of diddley bow (“type of stringed instrument”) 

  • A nervous or jittery person. 

verb
  • To dance the jitterbug. 

two-step

noun
  • A ballroom dance in duple time, having long, sliding steps 

  • A piece of music for this dance 

adj
  • Used other than figuratively or idiomatically: see two, step. 

How often have the words jitterbug and two-step occurred in a corpus of books? (source: Google Ngram Viewer )