heedlessness vs inadvertence

heedlessness

noun
  • The state or character of being heedless 

inadvertence

noun
  • The state or quality of being inadvertent; inadvertency; heedlessness; carelessness; negligence. 

  • An effect or result of inattention; an oversight or mistake from negligence. 

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