morgue vs undertaking

morgue

noun
  • A building or room where dead bodies are kept before their proper burial or cremation, (now) particularly in legal and law enforcement contexts. 

undertaking

noun
  • The business of an undertaker, or the management of funerals. 

  • A promise or pledge; a guarantee. 

  • That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise. 

  • The act of one who undertakes (in either sense). 

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