backset vs rebuff

backset

noun
  • A check; a relapse; a discouragement; a setback. 

  • Whatever is thrown back in its course, such as water. 

verb
  • To plow again in the fall; said of prairie land broken up in the spring. 

rebuff

noun
  • A sudden resistance or refusal. 

  • Repercussion, or beating back. 

  • He was surprised by her quick rebuff to his proposal. 

verb
  • To refuse; to offer sudden or harsh resistance; to turn down or shut out. 

  • To buff again. 

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