headlight vs peeper

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. 

peeper

noun
  • The eye. 

  • An animal, such as some frogs, having a shrill, high-pitched call. 

  • Someone who peeps; a spy. 

  • A chicken just breaking the shell; a young bird. 

  • A peeping tom. 

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