redact vs spell out

redact

verb
  • To reduce to form, as literary matter; to digest and put in shape (matter for publication); to edit. 

  • To black out legally protected sections of text in a document provided to opposing counsel, typically as part of the discovery process. 

  • To draw up or frame a decree, statement, etc. 

  • To censor, to black out or remove parts of a document while leaving the remainder. 

spell out

verb
  • To form (a word) from letters; say the letters in a word. 

  • To explain in clear and simple terms; to be explicit. 

  • To replace an acronym with its expansion. 

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