on the edge vs surrounding

on the edge

prep
  • With figurative or temporal proximity to (an event, state of mind, etc.). 

  • In a state of excitement due to taking risks. 

  • In a precarious position, with one's recourses nearly exhausted. 

surrounding

noun
  • An environment. 

  • An outlying area; area in proximity to something. 

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