ball sack vs madcap

ball sack

noun

  • An objectionable person (especially a man). 

  • The scrotum. 

madcap

noun

  • An impulsive, hasty, capricious person. 

adj

  • Hasty, impulsive, or reckless; capricious. 

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