backset vs stonewall

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. 

stonewall

noun
  • An obstruction. 

  • An alcoholic drink popular in colonial America, consisting of apple cider (or sometimes applejack) mixed with rum (or sometimes gin or whisky). 

  • A refusal to cooperate. 

verb
  • To obstruct. 

  • To refuse to answer or cooperate, especially in supplying information. 

adj
  • Certain, definite. 

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