expunge vs give birth

expunge

verb
  • To erase or strike out. 

  • To eliminate completely; to annihilate. 

  • To delete permanently (e-mail etc.) that was previously marked for deletion but still stored. 

give birth

verb
  • To release live offspring from the body into the environment. 

  • To become the parent of by birthing. 

  • To become the source of. 

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