shifty vs unreliable

shifty

adj
  • Having the appearance of being dishonest, criminal, or unreliable. 

  • Moving from one object to another; not looking directly and steadily at the person with whom one is speaking. 

  • Subject to frequent changes in direction. 

  • Resourceful; full of, or ready with, shifts or expedients. 

unreliable

adj
  • Not reliable. 

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