derivable vs determinable

derivable

adj
  • able to be derived, deducible 

determinable

adj
  • able to be determined or limited 

  • 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. 

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

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