seclude vs sever

seclude

verb
  • To shut or keep out; exclude; preclude. 

  • To shut off or keep apart, as from company, society, etc.; withdraw (oneself) from society or into solitude. 

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. 

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