e vs einsteinium

e

noun
  • The name of the Latin-script letter E/e. 

character
  • The fifth letter of the English alphabet, called e and written in the Latin script. 

einsteinium

noun
  • A transuranic chemical element (symbol Es) with atomic number 99: a soft, silvery, paramagnetic metal. 

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