disreputable vs principled

disreputable

adj
  • Not respectable, lacking repute; discreditable. 

noun
  • A person who is not reputable. 

principled

adj
  • Based on, having, or manifesting principles 

  • strongly adhering to, or heedful of, guiding beliefs or moral rules 

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