foxtrot vs rhumba

foxtrot

verb
  • To dance the foxtrot. 

noun
  • A pace with short steps, as in changing from trotting to walking. 

  • A ballroom dance with a slow-slow-quick-quick rhythm. 

rhumba

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