conga vs two-step

conga

noun
  • A march of Cuban origin in four-four time in which people form a chain, each holding the hips of the person in front of them; in each bar, dancers take three shuffle steps and then kick alternate legs outwards at the beat; the chain weaves around the place and allows new participants to join the back of the chain. 

  • A tall, narrow, single-headed Cuban hand drum of African origin. 

verb
  • To dance the conga. 

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 conga and two-step occurred in a corpus of books? (source: Google Ngram Viewer )