million vs nonillion

million

num

  • The cardinal number 1,000,000: 10⁶; a thousand thousand. 

  • An unspecified very large number. 

nonillion

num

  • 10³⁰. 

  • 10⁵⁴. 

noun

  • An unspecified very large number. 

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