vishap vs whirlpool

vishap

noun
  • a dragon in Armenian mythology closely associated with water 

whirlpool

noun
  • A swirling body of water. 

  • Turmoil, or agitated excitement. 

  • A hot tub, jacuzzi. 

verb
  • To spin or swirl like the water in a whirlpool. 

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