headlight vs ocular

headlight

noun
  • A bright light, with a lens and reflector, on the front of a motor vehicle (or originally a ship or train), designed to illuminate the road when driving at night; normally one of a pair. 

  • A woman's breast. 

  • A jewel; especially a diamond. 

  • Lysergic acid diethylamide (LSD). 

  • A woman's erect nipples, partially masked by clothing. 

ocular

noun
  • The eyepiece of a microscope or other optical instrument. 

  • Any of the scales forming the margin of a reptile's eye. 

adj
  • Seen by, or seeing with, the eye; visual. 

  • Of, or relating to the eye, or the sense of sight 

  • Resembling the eye. 

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