acquiescent vs headstrong

acquiescent

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

  • resting satisfied or submissive; disposed tacitly to submit 

headstrong

adj
  • Determined to do as one pleases, and not as others want. 

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