kafir vs mundane

kafir

noun
  • A disbeliever, a denier: someone who rejects or disbelieves in God as per Islam (Arabic: الله Allāh) or the tenets of Islam; or more broadly any non-Muslim. 

mundane

noun
  • A person who is not a Satanist. 

  • An unremarkable, ordinary human being. 

  • A person considered to be "normal", part of the mainstream culture, outside the subculture, not part of the elite group. 

  • The world outside fandom; the normal, mainstream world. 

adj
  • Worldly, earthly, profane, vulgar as opposed to heavenly. 

  • Ordinary; not new. 

  • Pertaining to the Universe, cosmos or physical reality, as opposed to the spiritual world. 

  • Tedious; repetitive and boring. 

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