mosque vs synagogue

mosque

noun
  • A place of worship for Muslims, often having at least one minaret; a masjid. 

synagogue

noun
  • A place of worship for Jews or Samaritans. 

  • A congregation of Jews or Samaritans for the purpose of worship or religious study. 

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