myriad vs too many to be counted

myriad

noun

  • A countless number or multitude (of specified things) 

  • Ten thousand; 10,000 

adj

  • Great in number; innumerable, multitudinous 

  • Multifaceted, having innumerable elements 

too many to be counted

How often have the words myriad and too many to be counted occurred in a corpus of books? (source: Google Ngram Viewer )