soul-searching vs studious

soul-searching

adj
  • Involving probing introspection, or a critical consideration of one's conscience, especially motives and values. 

noun
  • Probing introspection; a critical consideration of one's conscience; also, an instance of such consideration. 

studious

adj
  • 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. 

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

  • Earnest in endeavors; attentive; diligent 

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