maelstrom vs turmoil

maelstrom

noun
  • A chaotic or turbulent situation. 

  • A large and violent whirlpool. 

turmoil

noun
  • A state of great disorder or uncertainty. 

  • Harassing labour; trouble; disturbance. 

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