careful vs intentive

careful

adj
  • Taking care; attentive to potential danger, error or harm; cautious. 

  • Conscientious and painstaking; meticulous. 

intentive

adj
  • Paying attention; attentive, heedful. 

  • Expressing intent. 

  • Intent (of the mind, thoughts etc.). 

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