delete vs efface

delete

verb
  • To remove, get rid of or erase, especially written or printed material, or data on a computer or other device. 

  • To kill or murder. 

  • To defeat or dominate. 

noun
  • A remainder of a music or video release. 

  • The delete character (U+007F or %7F). 

  • A deletion. 

efface

verb
  • To erase (as anything impressed or inscribed upon a surface); to render illegible or indiscernible. 

  • Of the cervix during pregnancy, to thin and stretch in preparation for labor. 

  • To make oneself inobtrusive as if due to modesty or diffidence. 

  • To cause to disappear as if by rubbing out or striking out. 

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