equal vs verge upon

equal

verb
  • To make equivalent to; to cause to match. 

  • To have as its consequence. 

  • To be equal to, to have the same value as; to correspond to. 

adj
  • Intended for voices of one kind only, either all male or all female; not mixed. 

  • Adequate; sufficiently capable or qualified. 

  • The same in all respects. 

  • Exactly identical, having the same value. 

noun
  • A person or thing of equal status to others. 

verge upon

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