chagrin vs rankling

chagrin

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

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

verb
  • To bother or vex; to mortify. 

rankling

noun
  • A sensation that rankles. 

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