annoy vs vex

annoy

verb
  • To disturb or irritate, especially by continued or repeated acts; to bother with unpleasant deeds. 

  • To do something to upset or anger someone; to be troublesome. 

  • To molest; to harm; to injure. 

vex

verb
  • To annoy, irritate. 

  • To toss back and forth; to agitate; to disquiet. 

  • To twist, to weave. 

  • To cause (mental) suffering to; to distress. 

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