last rites vs obsequy

last rites

noun
  • Final treatment of a dead man. 

  • The Catholic sacrament of Anointing of the Sick. 

obsequy

noun
  • The last office for the dead. 

  • A funeral rite or service. 

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