nontheism vs recreancy

nontheism

noun
  • Any of a range of concepts regarding spirituality and religion which do not include the idea of a deity in the form of a theistic god or gods. 

recreancy

noun
  • The quality or state of being recreant; shameful cowardice; perfidy. 

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