tip of the iceberg vs warped

tip of the iceberg

noun
  • A small indication of a larger possibility; the first part encountered of a problem that is much bigger than it seems. 

warped

adj
  • Distorted by warping; twisted out of shape 

  • Of a person's mind, attitudes, etc, perverse, strange, aberrant or deviant. 

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