unclean vs unmoral

unclean

adj
  • Not moral or chaste. 

  • Dirty, soiled or foul. 

  • Ritually or ceremonially impure or unfit. 

unmoral

adj
  • Not moral. 

  • Not applicable for moral consideration. 

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