barn dance vs get one's leg over

barn dance

verb
  • To take part in barn dancing. 

noun
  • A type of set step routine dancing, such as square dance. 

get one's leg over

verb
  • To have sex 

  • Used other than figuratively or idiomatically: see get, one's, leg, over. 

How often have the words barn dance and get one's leg over occurred in a corpus of books? (source: Google Ngram Viewer )