sunlight vs working day

sunlight

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

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. 

working day

noun
  • Any of those days of a week on which work is done, officially Monday to Friday in many countries (even though many people work on weekends). 

  • The part of a day in which work is done; the number of hours one must work per day for a specified wage. 

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