disassociate vs estrange

disassociate

verb
  • To separate (oneself); to dissolve one's association with a person, group, or situation. 

  • To separate into smaller discrete units, as with analysis. 

  • To separate; to disunite; to disintegrate; to dissolve. 

estrange

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

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

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