excise vs unsnib

excise

verb
  • To cut out; to remove. 

  • To impose an excise tax on something. 

noun
  • A tax charged on goods produced within the country (as opposed to customs duties, charged on goods from outside the country). 

unsnib

verb
  • to undo, untie, or open or become undone, untied, or opened. 

  • Somehow she managed to unsnib the window and escape. 

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