purify vs sanctify

purify

verb
  • To free from guilt or sin. 

  • To cleanse, or rid of impurities. 

  • To become pure. 

sanctify

verb
  • To free from sin; to purify. 

  • To endorse with religious sanction. 

  • To make acceptable or useful under religious law or practice. 

  • To make holy; to consecrate; to set aside for sacred or ceremonial use. 

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