heavyset vs pyknic

heavyset

adj
  • Having a large, solid, imposing bodily appearance; overweight. 

pyknic

adj
  • short and stout; endomorphic 

noun
  • A short, thickset person characterised by thick neck, large abdomen and relatively short limbs; a endomorph. 

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