genuine vs tip of the iceberg

genuine

adj
  • Not counterfeit, spurious, false, or adulterated 

  • Belonging to, or proceeding from the original stock; native 

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. 

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