icon vs monoprint

icon

noun
  • A type of religious painting portraying a saint or scene from Scripture, often done on wooden panels. 

  • A small picture that represents something. 

  • A person or thing that is the best example of a certain profession or some doing. 

  • An image, symbol, picture, or other representation usually as an object of religious devotion. 

  • A word, character, or sign whose form reflects and is determined by the referent; onomatopoeic words are necessarily all icons. 

monoprint

noun
  • A form of printing on paper from a glass sheet to which oil paint has been applied; monotype. 

verb
  • To print using this technique. 

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