concretize vs instantiate

concretize

verb
  • To make concrete, substantial, real, or tangible; to represent or embody a concept through a particular instance or example. 

  • To be embodied, to have physical representation. 

instantiate

verb
  • To represent (a concept, theme, or principle) by an instance. 

  • To create an object (an instance) of a specific class. 

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