cognate vs heterogeneous

cognate

adj
  • Allied by blood; kindred by birth; specifically (law) related on the mother's side. 

  • Of the same or a similar nature; of the same family; proceeding from the same stock or root. 

  • Descended from the same source lexemes (same etymons) of an ancestor language. 

noun
  • One of a number of things allied in origin or nature. 

  • A word either descended from the same base word of the same ancestor language as the given word, or strongly believed to be a regular reflex of the same reconstructed root of proto-language as the given word. 

heterogeneous

adj
  • Incommensurable because of different kinds. 

  • Diverse in kind or nature; composed of diverse parts. 

  • Visibly consisting of different components. 

  • Of a network comprising different types of computers, potentially with vastly differing memory sizes, processing power and even basic underlying architecture; alternatively, of a data resource with multiple types of formats. 

  • Having more than one phase (solid, liquid, gas) present in a system or process. 

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