electric light vs sunlight

electric light

noun
  • Artificial light using electricity as a source of illumination. 

  • A device producing such light. 

sunlight

noun
  • All the electromagnetic radiation given off by the Sun, especially that in the visible spectrum that bathes the Earth. 

  • Brightness, hope; a positive outlook. 

  • Synonym of sunrise. 

verb
  • To work on the side (at a secondary job) during the daytime. 

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