abscise vs lop off

abscise

verb
  • To cut off. 

  • To separate by means of abscission; to shed or drop off. 

lop off

verb
  • To cut off as the top or extreme part of anything, especially to prune a small limb off a shrub or tree, or sometimes to behead someone. 

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