sever vs sew

sever

verb
  • To disconnect; to disunite; to terminate. 

  • To make a separation or distinction; to distinguish. 

  • To cut free. 

  • To suffer disjunction; to be parted or separated. 

sew

verb
  • Followed by into: to enclose by sewing. 

  • To use a needle to pass thread repeatedly through (pieces of fabric) in order to join them together. 

  • Of a ship, to be grounded. 

  • To use a needle to pass thread repeatedly through pieces of fabric in order to join them together. 

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