peril vs stillness

peril

verb
  • To cause to be in danger; to imperil; to risk. 

noun
  • A situation of serious and immediate danger. 

  • An event which causes a loss, or the risk of a specific such event. 

  • Something that causes, contains, or presents danger. 

stillness

noun
  • Habitual silence or quiet; taciturnity. 

  • The quality or state of being still. 

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