gain on vs overwin

gain on

verb
  • To get the better of; to have the advantage of. 

  • To encroach on. 

  • To obtain influence with. 

  • To win ground upon; to move faster than, as in a race or contest. 

overwin

verb
  • To overcome; gain one's point; exceed. 

noun
  • The win or winning of a game. 

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