tousle vs unsettle

tousle

verb
  • To put into disorder; to tumble; to touse; to muss. 

noun
  • The action of ruffling or setting in disorder. 

unsettle

verb
  • To bring into disorder or disarray 

  • To make upset or uncomfortable 

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