pester vs take care of

pester

verb
  • To bother, harass, or annoy persistently. 

noun
  • A bother or nuisance. 

take care of

verb
  • To deal with, handle. 

  • To look after, to provide care for. 

  • To kill. 

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