donative vs tithing

donative

noun
  • A gift; a largess; a gratuity. 

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

adj
  • Being or relating to a donation. 

tithing

noun
  • The collection of tithes. 

  • The payment of tithes. 

  • A part of the hundred as a rural division of territory. 

  • Ten sheaves of wheat (originally set up as such for the tithe-proctor). 

  • The tithe given as an offering to the church. 

  • A body of households (originally a tenth of a hundred or ten households) bound by frankpledge to collective responsibility and punishment for each other's behavior. 

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