adaptability vs malleableness

adaptability

noun
  • The quality of being adaptable; a quality that renders adaptable. 

  • Variability in respect to, or under the influence of, external conditions; susceptibility of an organism to that variation whereby it becomes suited to or fitted for its conditions of environment; the capacity of an organism to be modified by circumstances. 

malleableness

noun
  • The quality of being malleable. 

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