malleable vs pliable

malleable

adj
  • Able to be hammered into thin sheets; capable of being extended or shaped by beating with a hammer, or by the pressure of rollers. 

  • Flexible, liable to change. 

  • in which an adversary can alter a ciphertext such that it decrypts to a related plaintext 

pliable

adj
  • Soft, flexible, easily bent, formed, shaped, or molded. 

  • Easily persuaded; yielding to influence. 

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