freelance vs moonlight

freelance

verb
  • To work as a freelance. 

  • To produce or sell services as a freelance. 

adj
  • Of, or relating to a freelance; without employment contract. 

noun
  • A medieval mercenary. 

  • Someone who sells their services to clients without a long-term employment contract. 

moonlight

verb
  • To work on the side (at a secondary job), often in the evening or during the night. 

  • To engage in an activity other than what one is known for. 

  • To perform a secondary function substantially different from its supposed primary function, as in protein moonlighting. 

noun
  • The light reflected from the Moon. 

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