consent vs forbid

consent

verb
  • To express willingness, to give permission. 

  • To cause to sign a consent form. 

  • To agree in opinion or sentiment; to be of the same mind; to accord; to concur. 

noun
  • Voluntary agreement or permission. 

forbid

verb
  • To disallow; to proscribe. 

  • To oppose, hinder, or prevent, as if by an effectual command. 

  • To deny, exclude from, or warn off, by express command. 

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