get busy vs get some

get busy

verb
  • Have sex 

  • Start working, usually in opposition to idleness. 

get some

verb
  • To have sex. 

  • Used other than figuratively or idiomatically: see get, some. 

  • To be involved in a fight or assault. 

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