extensibility vs resistance

extensibility

noun
  • The capability of being extended 

  • A quality of design that takes possible future advances into consideration and attempts to accommodate them 

resistance

noun
  • The act of resisting, or the capacity to resist. 

  • An underground organisation engaged in a struggle for liberation from forceful occupation; a resistance movement. 

  • A force that tends to oppose motion. 

  • electrical resistance. 

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