go over vs unlink

go over

verb
  • To create a response or impression. 

  • Used other than figuratively or idiomatically: see go, over. 

  • To look at carefully; to scrutinize; to analyze. 

  • To score a try. 

unlink

verb
  • To decouple; to remove a link from, or separate the links of. 

  • To delete (a file). 

noun
  • A link that is equivalent (under ambient isotopy) to finitely many disjoint circles in the plane. 

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