deference vs piety

deference

noun
  • The willingness to carry out the wishes of others. 

  • Great respect. 

piety

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

  • Reverence and devotion to God. 

  • A devout act or thought. 

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

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