amuse vs pester

amuse

verb
  • To cause laughter or amusement; to be funny. 

  • To entertain or occupy (someone or something) in a pleasant manner; to stir (an individual) with pleasing emotions. 

pester

verb
  • To bother, harass, or annoy persistently. 

noun
  • A bother or nuisance. 

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