bulbous vs spheric

bulbous

adj
  • Having the shape of or resembling a bulb, bloated. 

  • Growing from a bulb or producing bulbs. 

  • Overweight and round in shape. 

spheric

adj
  • Spherical. 

  • Of or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set. 

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