undraw vs unsheathe

undraw

verb
  • To draw aside or open; to pull back a layer of fabric, e.g. a curtain. 

  • To clear or erase part of a drawing. 

unsheathe

verb
  • To deprive of a sheath; to draw from the sheath or scabbard, as a sword. 

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