christening vs liturgy

christening

noun
  • Any instance of someone's or something's being christened. 

  • The Christian sacrament at which someone, usually a child, is baptized and given a Christian name. 

liturgy

noun
  • An official worship service of the Christian church. 

  • A predetermined or prescribed set of rituals that are performed, usually by a religion. 

  • In Ancient Greece, a form of personal service to the state. 

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