assent vs disapprove

assent

verb
  • To agree to a proposal. 

noun
  • agreement; act of agreeing 

disapprove

verb
  • To refuse to approve; reject. 

  • To have or express an unfavorable opinion. 

  • To condemn; to consider wrong or inappropriate; used with of. 

  • She disapproves of rap music because of its sometimes aggressive lyrics. 

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