lop off vs replace

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. 

replace

verb
  • To demolish (a building) and build an updated form of that building in its place. 

  • To place again. 

  • To put in a new or different place. 

  • To take over the position or role from. 

  • To take the place of; to be used instead of 

  • To restore to a former place, position, condition, etc.; to put back 

  • To refund; to repay; to pay back 

  • To supply or substitute an equivalent for 

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