altar vs dargah

altar

noun
  • A table or similar flat-topped structure used for religious rites. 

  • A raised area around an altar in a church; the sanctuary. 

  • Any (real or notional) place where something is worshipped or sacrificed to. 

dargah

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

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