Yahoo vs leviathan

Yahoo

noun
  • One of a race of brutes, who look and act similar to men, inhabiting the same land as the civilized Houyhnhnms. 

  • An employee of the Internet company Yahoo!. 

leviathan

noun
  • The political state, especially a domineering and totalitarian one as theorized by Thomas Hobbes. 

  • Something monstrously large or mighty in size, strength, wealth, etc. 

  • A vast sea monster of tremendous strength, described as the most powerful and dangerous creature in the ocean. 

adj
  • Very large; gargantuan. 

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