principled vs self-seeking

principled

adj
  • Based on, having, or manifesting principles 

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

self-seeking

noun
  • The selfish promotion of one's own interests. 

adj
  • Mindful of, or promoting, only one's own interests. 

  • That searches for a target automatically. 

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