blank out vs forget

blank out

verb
  • To erase (something), leaving a blank in its place. 

  • To set even; to neutralise. 

  • To become blank. 

  • To temporarily lose memory. 

  • To erase from one's memory. 

forget

verb
  • To unintentionally leave something behind. 

  • To lose remembrance of. 

  • To unintentionally not do, neglect. 

  • To cease remembering. 

  • Euphemism for fuck, screw (a mild oath). 

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