light bulb vs streetlight

light bulb

noun
  • An article that resembles such a bulb and converts electricity to light by any process. 

  • An evacuated glass bulb containing a metal filament which is heated by electrical resistance to produce light. 

  • Used in reference to the sudden arrival of a realization, an inspiration, an idea, or the like. 

streetlight

noun
  • The light produced by these lights. 

  • Any large outdoor light used to illuminate a public area, usually urban. 

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