christening vs last rites

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. 

last rites

noun
  • Final treatment of a dead man. 

  • The Catholic sacrament of Anointing of the Sick. 

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