drop out vs hang out to dry

drop out

verb
  • Used other than figuratively or idiomatically: see drop, out. 

  • To leave (school, a race, etc.) prematurely and voluntarily. 

  • To be lost or momentarily interrupted. 

  • To opt out of conventional society. 

hang out to dry

verb
  • Used other than figuratively or idiomatically: see hang, out, dry. 

  • To abandon someone who is in need or in danger, especially a colleague or one dependent. 

How often have the words drop out and hang out to dry occurred in a corpus of books? (source: Google Ngram Viewer )