iceberg vs passionate

iceberg

noun
  • A huge mass of ocean-floating ice which has broken off a glacier or ice shelf 

  • An aloof person. 

  • An impending disastrous event whose adverse effects are only beginning to show, in reference to one-tenth of the volume of an iceberg being visible above water. 

passionate

noun
  • A passionate individual. 

adj
  • Given to strong feeling, sometimes romantic, sexual, or both. 

  • Fired with intense feeling. 

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