congeneric vs congenial

congeneric

adj
  • Of or pertaining to congeners (organisms of the same genus) 

congenial

adj
  • Having the same or very similar nature, personality, tastes, habits or interests. 

  • Friendly or sociable. 

  • Suitable to one’s needs. 

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