achieve vs unsettle

achieve

verb
  • To obtain (a material thing). 

  • Show all the spoils by valiant kings achieved. 

  • To succeed in something, now especially in academic performance. 

  • To carry out successfully; to accomplish. 

  • To obtain, or gain (a desired result, objective etc.), as the result of exertion; to succeed in gaining; to win. 

unsettle

verb
  • To bring into disorder or disarray 

  • To make upset or uncomfortable 

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