acquiesce vs assent

acquiesce

verb
  • To concur upon conviction; to assent to; usually, to concur, not heartily but so far as to forbear opposition. 

  • To rest satisfied, or apparently satisfied, or to rest without opposition and discontent (usually implying previous opposition or discontent); to accept or consent by silence or by omitting to object. 

assent

verb
  • To agree to a proposal. 

noun
  • agreement; act of agreeing 

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