encrypted vs plain text

encrypted

adj
  • Being in code; having been encrypted. 

plain text

adj
  • Consisting only of plain text. 

noun
  • Text or any data that is to be encrypted (as opposed to ciphertext). 

  • Data which consists only of human-readable text, as opposed to machine-readable binary data or formatting markup. 

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