abirritate vs frustrate

abirritate

verb
  • To diminish the sensibility of; to debilitate; to soothe. 

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 abirritate and frustrate occurred in a corpus of books? (source: Google Ngram Viewer )