free-thinking vs unholy

free-thinking

adj
  • Having opinions that are contrary to dogma or the positions of authority. 

unholy

adj
  • Not holy; (by extension) evil, impure, or otherwise perverted. 

  • Dreadful, terrible, excessive, or otherwise atrocious. 

How often have the words free-thinking and unholy occurred in a corpus of books? (source: Google Ngram Viewer )