plight vs word of honor

plight

noun
  • A dire or unfortunate situation. 

  • Blame; culpability; fault; wrong-doing; sin; crime. 

  • One's office; duty; charge. 

  • Responsibility for ensuing consequences; risk; danger; peril. 

  • An instance of danger or peril; a dangerous moment or situation. 

verb
  • To promise (oneself) to someone, or to do something. 

  • Specifically, to pledge (one's troth etc.) as part of a marriage ceremony. 

word of honor

noun
  • A promise, or a pledge of one's good faith. 

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