distend vs protract

distend

verb
  • To extend or expand, as from internal pressure; to swell 

  • To cause to swell. 

  • To cause gravidity. 

protract

verb
  • To extend; to protrude. 

  • To draw out; to extend, especially in duration. 

  • To draw to a scale; to lay down the lines and angles of, with scale and protractor; to plot. 

  • To put off to a distant time; to delay; to defer. 

  • To use a protractor. 

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