free lunch vs recompense

free lunch

noun
  • Something obtained without any payment, obligation or effort. 

recompense

noun
  • An equivalent returned for anything given, done, or suffered; compensation; reward; amends; requital. 

  • That which compensates for an injury, or other type of harm or damage. 

verb
  • To reward or repay (someone) for something done, given etc. 

  • To give compensation for an injury, or other type of harm or damage. 

  • To give (something) in return; to pay back; to pay, as something earned or deserved. 

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