do someone's head in vs vex

do someone's head in

verb
  • To frustrate, infuriate, irritate or disturb someone. 

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 do someone's head in and vex occurred in a corpus of books? (source: Google Ngram Viewer )