backset vs bummer

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. 

bummer

noun
  • A disappointment, a pity, a shame. 

  • A lamb (typically the smallest of a multiple birth) which has been abandoned by its mother or orphaned, and as a consequence is raised in part or in whole by humans. 

  • A gay man. 

intj
  • Exclamation of annoyance or frustration at a bummer (disappointment). 

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