icon vs talisman

icon

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

  • A small picture that represents something. 

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

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

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

talisman

noun
  • A magical object providing protection against ill will, or the supernatural, or conferring the wearer with a boon such as good luck, good health, or power(s). 

verb
  • To be worn as a talisman. 

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