backset vs ebb

backset

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

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

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

ebb

noun
  • The receding movement of the tide. 

  • A European bunting, the corn bunting (Emberiza calandra, syns. Emberiza miliaria, Milaria calandra). 

  • A gradual decline. 

  • A low state; a state of depression. 

verb
  • to fish with stakes and nets that serve to prevent the fish from getting back into the sea with the ebb 

  • To cause to flow back. 

  • to flow back or recede 

  • to fall away or decline 

adj
  • low, shallow 

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