dargah vs reliquary

dargah

noun
  • A shrine associated with the grave of a Muslim saint or similar religious figure. 

reliquary

noun
  • A container to hold or display religious relics. 

  • A person who owes a balance. 

  • An object that sustains the memory of past people or events. 

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