principled vs scrupulous

principled

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

  • Based on, having, or manifesting principles 

scrupulous

adj
  • Wrongly feeling guilt or anxiety about one’s morality; suffering from scrupulosity. 

  • Having scruples or compunctions. 

  • Precise; exact or strict. 

  • Exactly and carefully conducted. 

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