copious vs unfruitful

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. 

unfruitful

adj
  • Not bearing fruit. 

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