pantheon vs sanctum sanctorum

pantheon

noun
  • A temple dedicated to all the gods. 

  • All the gods of a particular people or religion, particularly the ancient Greek gods residing on Olympus, considered as a group. 

  • A category or classification denoting the most honored persons of a group. 

sanctum sanctorum

noun
  • The Holy of Holies in the Jewish temple. 

  • A person's most private retreat or sanctuary. 

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