napping vs negligent

napping

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

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

negligent

adj
  • Careless or inattentive. 

  • Culpable due to negligence. 

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