adaptability vs portability

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. 

portability

noun
  • The quality of being portable. 

  • The ability of a program (or software system) to execute properly on multiple hardware platforms. 

  • The ability of an employee to move between different social security schemes without losing their contributions. 

  • The ability of a telephone subscriber to keep his/her number when switching to a different network. 

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