clean as a hound's tooth vs lily-white

clean as a hound's tooth

adj
  • Very clean; very innocent. 

lily-white

adj
  • Innocent, having a reputation beyond reproach. 

  • Pure, unblemished, immaculate. 

  • Of the Caucasian race; white. 

  • A shade of the color white. 

How often have the words clean as a hound's tooth and lily-white occurred in a corpus of books? (source: Google Ngram Viewer )