multitude vs nonillion

multitude

noun
  • A great amount or number, often of people; abundance, myriad, profusion. 

  • The mass of ordinary people; the masses, the populace. 

nonillion

noun
  • An unspecified very large number. 

num
  • 10³⁰. 

  • 10⁵⁴. 

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