fairing vs offertory

fairing

noun
  • A type of small gingerbread biscuit; a ginger nut. 

  • A structure on various parts of a vehicle, for example an aircraft, automobile, or motorcycle, that produces a smooth exterior and reduces drag. 

offertory

noun
  • A linen or silken cloth anciently used in various ceremonies connected with the administration of the Eucharist. 

  • A prayer said or sung as an anthem while offerings of bread and wine are placed on the altar during the Roman Catholic Mass or the Anglican Communion service. 

  • The part of the Eucharist service when offerings of bread and wine are placed on the altar and when any collection is taken; also, the money or other things collected. 

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