a multitude vs copious

a multitude

copious

adj
  • Full of thought, information, or matter; exuberant in words, expression, or style. 

  • Vast in quantity or number, profuse, abundant; taking place on a large scale. 

  • Having an abundant supply. 

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