crooked vs double-faced

crooked

adj
  • Dishonest or illegal; corrupt. 

  • Not straight; having one or more bends or angles. 

  • Set at an angle; not vertical or square. 

double-faced

adj
  • deceitful; hypocritical; treacherous 

  • Having two functional faces. 

How often have the words crooked and double-faced occurred in a corpus of books? (source: Google Ngram Viewer )