big-boned vs gravitationally challenged

big-boned

adj
  • Fat, obese. 

  • Of a person or animal: large but not obese. 

gravitationally challenged

adj
  • Fat. 

  • Of a person, having a poor sense of balance; subject to intervals of dizziness. 

How often have the words big-boned and gravitationally challenged occurred in a corpus of books? (source: Google Ngram Viewer )