studious vs well-grounded

studious

adj
  • Dedicated to study; devoted to the acquisition of knowledge from books 

  • Given to thought, or to the examination of subjects by contemplation; contemplative. 

  • Favorable to study; suitable for thought and contemplation 

  • Planned with study; deliberate; studied. 

  • Earnest in endeavors; attentive; diligent 

well-grounded

adj
  • Of a person: having extensive knowledge of a subject. 

  • Of an argument, etc.: based on good judgment and solid reasoning. 

How often have the words studious and well-grounded occurred in a corpus of books? (source: Google Ngram Viewer )