docile vs unyielding

docile

adj
  • Ready to accept instruction or direction; obedient; subservient. 

  • Yielding to control or supervision, direction, or management. 

unyielding

adj
  • Not giving in; not bending; stubborn. 

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