increase vs protract

increase

verb
  • To make (a quantity, etc.) larger. 

  • To multiply by the production of young; to be fertile, fruitful, or prolific. 

  • To become more nearly full; to show more of the surface; to wax. 

  • (of a quantity, etc.) To become larger or greater. 

noun
  • The creation of one or more new stitches; see Increase (knitting). 

  • For a quantity, the act or process of becoming larger 

  • Offspring, progeny 

  • An amount by which a quantity is increased. 

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 increase and protract occurred in a corpus of books? (source: Google Ngram Viewer )