obsequy vs sepulchre

obsequy

noun
  • A funeral rite or service. 

  • The last office for the dead. 

sepulchre

noun
  • A burial chamber. 

  • A recess in some early churches in which the reserved sacrament, etc. was kept from Good Friday till Easter. 

verb
  • To place in a sepulchre. 

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