pliant vs yielding

pliant

adj
  • Capable of plying or bending; readily yielding to force or pressure without breaking 

  • Easily influenced; tractable. 

yielding

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

noun
  • A concession. 

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