puzzle out vs work through

puzzle out

verb
  • To figure out; to discover or find a solution to. 

work through

verb
  • To get past a difficult or stressful situation by thinking or talking about it. 

  • Used other than figuratively or idiomatically: see work, through. 

How often have the words puzzle out and work through occurred in a corpus of books? (source: Google Ngram Viewer )