disregard vs heed

disregard

verb
  • To ignore; pay no attention to. 

noun
  • The act or state of deliberately not paying attention or caring about; misregard. 

heed

verb
  • To mind; to regard with care; to take notice of; to attend to; to observe. 

noun
  • Careful attention. 

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