altar vs place of worship

altar

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

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

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

place of worship

noun
  • A place, usually a building such as a church, mosque, synagogue or temple where believers can practise their faith. 

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