knockback vs slighting

knockback

noun
  • A rejection; a refusal. 

  • A blow that causes the recipient to fall or move backwards, a knock back; a recoil. 

  • Something that impedes or reverses progress; a setback. 

slighting

noun
  • The action of rejecting someone or something; rejection. 

  • The act of giving a slight or snub. 

  • The full or partial demolition of a fortification. 

  • An act of ignoring or neglecting someone or something; more broadly neglect. 

adj
  • In the manner of a slight; belittling, deprecative 

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