entrench vs yield

entrench

verb
  • To invade; to encroach; to infringe or trespass; to enter on, and take possession of, that which belongs to another; usually followed by on or upon. 

  • To surround or provide with a trench, especially for defense; to dig in. 

  • To establish a substantial position in business, politics, etc. 

  • To dig or excavate a trench; to trench. 

  • To cut in; to furrow; to make trenches in or upon. 

  • To become completely absorbed in and fully accept one's beliefs, even in the face of evidence against it and refusing to be reasoned with. 

yield

verb
  • To give way; to allow another to pass first. 

  • To furnish; to afford; to render; to give forth. 

  • To produce as a result. 

  • To give, or give forth, (anything). 

  • To produce a particular sound as the result of a sound law. 

  • To produce as return, as from an investment. 

  • To give way; to succumb to a force. 

  • To give as required; to surrender, relinquish or capitulate. 

  • To pass the material's yield point and undergo plastic deformation. 

  • To admit to be true; to concede; to allow. 

noun
  • Profit earned from an investment; return on investment. 

  • A product; the quantity of something produced. 

  • The explosive energy value of a bomb, especially a nuke, usually expressed in tons of TNT equivalent. 

  • The current return as a percentage of the price of a stock or bond. 

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