supple vs unpliant

supple

verb
  • To make or become supple. 

  • To make compliant, submissive, or obedient. 

adj
  • Lithe and agile when moving and bending. 

  • Compliant; yielding to the will of others. 

  • Pliant, flexible, easy to bend. 

unpliant

adj
  • Not pliant. 

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