carelessness vs laxity

carelessness

noun
  • Lack of care; the state or quality of being careless. 

laxity

noun
  • The state of being lax; looseness, lack of tension. 

  • Moral looseness; lack of rigorousness or strictness. 

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