conscientious vs true-hearted

conscientious

adj
  • Influenced by conscience; governed by a strict regard to the dictates of conscience, or by the known or supposed rules of right and wrong (said of a person). 

  • Thorough, careful, or vigilant in one’s task performance. 

true-hearted

adj
  • Having a faithful heart; honest; sincere; not faithless or deceitful. 

How often have the words conscientious and true-hearted occurred in a corpus of books? (source: Google Ngram Viewer )