allay vs vex

allay

verb
  • To alleviate; to abate; to mitigate. 

  • To make quiet or put at rest; to pacify or appease; to quell; to calm. 

noun
  • Alleviation; abatement; check. 

vex

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

  • To twist, to weave. 

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

  • To annoy, irritate. 

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