materialist vs skeptical

materialist

adj
  • Having features typical of philosophical materialism. 

noun
  • Someone who is materialistic, concerned only with material possessions. 

  • A follower or proponent of philosophical materialism. 

skeptical

adj
  • Of or relating to philosophical skepticism or the skeptics. 

  • Having, or expressing doubt; questioning. 

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