appease vs frustrate

appease

verb
  • To come to terms with; to adapt to the demands of. 

  • To make quiet; to calm; to reduce to a state of peace; to dispel (anger or hatred). 

frustrate

verb
  • To hinder or thwart. 

  • To cause stress or annoyance. 

  • To disappoint or defeat; to vex by depriving of something expected or desired. 

adj
  • ineffectual; useless; fruitless. 

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