catacomb vs cellar

catacomb

noun
  • An underground system of tunnels and chambers with recesses for graves, used (in former times) as a cemetery; a tunnel system used for burying the dead, as in Paris or Ancient Rome. 

cellar

noun
  • An enclosed underground space, often under a building, used for storage or shelter. 

  • A small dish for holding salt. 

  • Last place in a league or competition. 

  • salt cellar 

  • A basement. 

  • A wine collection, especially when stored in a cellar. 

verb
  • To store in a cellar. 

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