disassociate vs uncouple

disassociate

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

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

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

uncouple

verb
  • To disconnect or detach one thing from another. 

  • To come loose. 

  • To loose, as dogs, from their couples. 

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