on the loose vs sprung

on the loose

prep
  • Not incarcerated or in captivity; not under control. 

sprung

adj
  • Caught doing something illegal or against the rules. 

  • Utterly infatuated with someone; completely taken over by romantic interest. 

  • Fitted or cushioned with springs. 

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