headlight vs street light

headlight

noun
  • A woman's breast. 

  • A jewel; especially a diamond. 

  • 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. 

  • Lysergic acid diethylamide (LSD). 

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

street light

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