contemporize vs keep someone posted

contemporize

verb
  • To bring up to date; often specifically to set a historical narrative in a modern context 

  • To modify, repackage, or present a well-known or traditional product or brand in a way that appeals to contemporary consumers. 

keep someone posted

verb
  • To inform (someone) regularly of the latest developments. 

How often have the words contemporize and keep someone posted occurred in a corpus of books? (source: Google Ngram Viewer )