eternize vs memorialize

eternize

verb
  • To immortalize; to make eternally famous. 

  • To make or render eternal. 

  • To prolong indefinitely. 

memorialize

verb
  • To provide a memorial for someone; to commemorate. 

  • To create a written record of a meeting or conversation. 

  • To convert (someone’s profile) into a memorial site/page (e.g. on Facebook). 

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