etch vs inscribe

etch

verb
  • To sketch; to delineate. 

  • To engrave a surface. 

  • To make a lasting impression. 

  • To cut into a surface with an acid or other corrosive substance in order to make a pattern. Best known as a technique for creating printing plates, but also used for decoration on metal, and, in modern industry, to make circuit boards. 

inscribe

verb
  • To write or cut (words) onto (something, especially a hard surface, or a book to be given to another person); to engrave. 

  • To draw a circle, sphere, etc. inside a polygon, polyhedron, etc. and tangent to all its sides. 

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