disassociate vs loosen

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. 

loosen

verb
  • To become unfastened or undone. 

  • To make loose. 

  • To free from restraint; to set at liberty. 

  • To relieve (the bowels) from constipation; to promote defecation. 

  • To become loose. 

  • To disengage (a device that restrains). 

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