heedlessly vs precipitously

heedlessly

adv
  • In a heedless manner: with unawareness; without noticing; carelessly, inattentively. 

precipitously

adv
  • Abruptly; quickly. 

  • At a sharp upwards angle. 

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