ceremony vs christening

ceremony

noun
  • A ritual, with religious or cultural significance. 

  • An official gathering to celebrate, commemorate, or otherwise mark some event. 

  • A formal socially established behaviour, often in relation to people of different ranks; formality. 

  • Show of magnificence, display, ostentation. 

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. 

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