backset vs disadvantage

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. 

disadvantage

noun
  • A setback or handicap. 

  • A weakness or undesirable characteristic; a con. 

  • Loss; detriment; hindrance. 

verb
  • To place at a disadvantage. 

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