chagrin vs confuse

chagrin

verb
  • To bother or vex; to mortify. 

noun
  • Distress of mind caused by a failure of aims or plans, want of appreciation, mistakes etc; vexation or mortification. 

  • A type of leather or skin with a rough surface. 

confuse

verb
  • To mix thoroughly; to confound; to disorder. 

  • to puzzle, perplex, baffle, bewilder (somebody); to afflict by being complicated, contradictory, or otherwise difficult to understand 

  • To mix up, muddle up (one thing with another); to mistake (one thing for another). 

  • To be confused. 

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