efficiently vs stably

efficiently

adv
  • In an efficient manner. 

stably

adv
  • In a stable manner. 

noun
  • A medieval hunting practice in which a group of hunters and hounds are stationed around the perimeter of a wood during a hunt to prevent the escape of the game. 

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