napping vs thoughtless

napping

noun
  • The act of taking a nap or short sleep. 

  • The act or process of raising a nap, as on cloth. 

thoughtless

adj
  • Lacking thought or consideration. 

  • Marked by or showing lack of due thought or care; careless. 

  • Inconsiderate, inattentive. 

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