endangered vs powerful

endangered

adj
  • in danger, at risk, said of something where there is a strong possibility something bad will happen to it (for example, a species in danger of going extinct) 

powerful

adv
  • Synonym of very 

adj
  • Having, or capable of exerting power, potency or influence. 

  • Leading to many or important deductions. 

  • Large; capacious; said of veins of ore. 

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