portability vs transportability

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. 

transportability

noun
  • The quality of equipment, devices, systems, and associated hardware that permits their being moved from one location to another to interconnect with locally available complementary equipment, devices, systems, associated hardware, or other complementary facilities. 

  • The capability of materiel to be moved by towing, self-propulsion, or carrier via any means, such as railways, highways, waterways, pipelines, oceans, and airways. 

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