napping vs regardless

napping

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

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

regardless

adj
  • despite everything; despite the situation 

  • Having no regard; heedless; careless. 

adv
  • Without attention to warnings or indications of bad consequences. 

prep
  • Synonym of regardless of; paying no attention to 

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