coextensive vs congenerous

coextensive

adj
  • Having the same extension—the object or set of objects to which a term refers. 

  • Having the same spatial limits or boundaries; sharing the same area. 

  • Occurring over the same period of time; contemporaneous. 

congenerous

adj
  • Having the same (kind of) origin or action 

  • Belonging to the same taxonomic genus; congeneric 

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