acquiescent vs malleable

acquiescent

adj
  • resting satisfied or submissive; disposed tacitly to submit 

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

malleable

adj
  • Flexible, liable to change. 

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

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

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