nigh vs verging on

nigh

adj
  • Not remote in degree, kindred, circumstances, etc.; closely allied; intimate. 

verb
  • to draw nigh (to); to approach; to come near 

adv
  • Almost, nearly. 

prep
  • near; close to 

verging on

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