encode vs unfold

encode

verb
  • To constitute the code necessary for the biosynthesis of a protein by means of a matrix so as to transcribe DNA material. 

  • To convert source information into another form. 

  • To convert (plain text) into code. 

noun
  • An encoding operation. 

unfold

noun
  • In functional programming, a kind of higher-order function that is the opposite of a fold. 

verb
  • To undo a folding. 

  • To release from a fold or pen. 

  • To turn out; to happen; to develop. 

  • To open (anything covered or closed); to lay open to view or contemplation; to bring out in all the details, or by successive development. 

  • To reveal. 

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