determinable vs underivable

determinable

adj
  • able to be decided or settled by law 

  • Of a tenure or estate in land, able to be determined on the occurrence of some event. 

  • able to be determined or limited 

noun
  • An attribute of something that is susceptible of determination into various states 

underivable

adj
  • That cannot be derived. 

noun
  • Something that cannot be derived. 

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