donative vs free lunch

donative

noun
  • A benefice conferred on a person by the founder or patron, without either presentation or institution by the ordinary, or induction by his orders. 

  • A gift; a largess; a gratuity. 

adj
  • Being or relating to a donation. 

free lunch

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

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