ceremonial vs impolite

ceremonial

adj
  • Of, relating to, or used in a ceremony. 

noun
  • A ceremony, or series of ceremonies, prescribed by ritual. 

impolite

adj
  • Not polite; not of polished manners; wanting in good manners. 

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