inattentive vs intentive

inattentive

adj
  • Of or pertaining to a lack of attention; not paying attention; careless. 

intentive

adj
  • Paying attention; attentive, heedful. 

  • Expressing intent. 

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

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