disunite vs unlink

disunite

verb
  • To separate, sever, or split. 

  • To cause disagreement or alienation among or within. 

  • To disintegrate; to come apart. 

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 disunite and unlink occurred in a corpus of books? (source: Google Ngram Viewer )