encode vs unravel

encode

noun
  • An encoding operation. 

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. 

unravel

verb
  • To separate the threads (of); disentangle. 

  • To become separated; (of something woven, knitted, etc.) to come apart. 

  • To separate the connected or united parts of; to throw into disorder; to confuse. 

  • To clear from complication or difficulty; to unfold; to solve. 

  • To become undone; to collapse. 

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