consent vs differ

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. 

differ

noun
  • A program that diffs, a diff. 

verb
  • Not to have the same traits or characteristics; to be unalike or distinct. 

  • To have diverging opinions, disagree. 

  • To be separated in quantity. 

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