conscientious vs painstaking

conscientious

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

  • 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). 

painstaking

adj
  • Carefully attentive to details; diligent in performing a process or procedure. 

noun
  • The application of careful and attentive effort. 

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