nullifidian vs polytheistic

nullifidian

adj
  • Of no faith or religion; not trusting to faith for salvation. 

noun
  • A sceptic; an atheist or unbeliever. 

polytheistic

adj
  • Of or relating to polytheism, 

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