disseisin vs disseizin

disseisin

noun
  • The act of disseizing. 

disseizin

noun
  • The act of disseizing; an act of unlawful dispossessing, especially of someone's lands. 

  • Dispossession. 

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