shortening vs stretching

shortening

noun
  • Fat that is solid at room temperature, such as margarine or lard (not usually used of butter), used to make shortcrust pastry. 

stretching

adj
  • Requiring a high level of effort or performance. 

noun
  • The act by which something is stretched. 

  • A form of physical exercise in which a specific skeletal muscle (or muscle group) is deliberately elongated to its fullest length in order to improve the muscle's felt elasticity and reaffirm comfortable muscle tone. 

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