ideolatry vs piety

ideolatry

noun
  • The worship or devotion to the thoughts and intents derived from the human mind. 

  • The worship, attachment, or devotion to a concept originating and existing in the mind as a result of mental understanding, awareness, or activity. 

  • The worship of the human intellect. 

piety

noun
  • A devout act or thought. 

  • Reverence and devotion to God. 

  • A belief that is accepted unthinkingly and with undue reverence. 

  • Similar reverence to one's parents and family or to one's country. 

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