acquiescent vs yielding

acquiescent

adj
  • resting satisfied or submissive; disposed tacitly to submit 

  • willing to acquiesce, accept or agree to something without objection, protest or resistance 

yielding

adj
  • Docile, or inclined to give way to pressure. 

noun
  • A concession. 

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