house of worship vs musalla

house of worship

noun
  • A religious edifice; a mosque, church, synagogue, temple, or similar place where believers go to practice their faith. 

musalla

noun
  • A place for praying (e.g. outside a mosque); a praying room. 

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