estrange vs split up

estrange

verb
  • To cause to feel less close or friendly; alienate. To cease contact with (particularly of a family member or spouse, especially in form estranged). 

  • To remove from an accustomed place or set of associations. 

split up

verb
  • separate, disassociate, cause to come apart. 

  • Cease to be together, break apart from the group. 

adj
  • Divided or separated. 

How often have the words estrange and split up occurred in a corpus of books? (source: Google Ngram Viewer )