aerobics vs dancercise

aerobics

noun
  • A form of exercise, designed to enhance one's cardiovascular fitness, normally performed to music. 

dancercise

noun
  • Any aerobic exercise in the form of energetic dance. 

verb
  • To perform this kind of exercise. 

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