affiance vs theism

affiance

noun
  • Faith, trust. 

verb
  • To be betrothed to; to promise to marry. 

theism

noun
  • Belief in the existence of at least one deity. 

  • Belief in the existence of a personal creator god, goddess, gods and/or goddesses present and active in the governance and organization of the world and the universe. The God may be known by or through revelation. 

  • A morbid condition resulting from excessive consumption of tea. 

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