text file vs typescript

text file

noun
  • A data file containing only plain, human-readable text, distinct from documents with embedded formatting 

  • A data file in a character encoding that allows it to be read in non-specialised text editor. 

typescript

noun
  • typewritten material, especially such a copy of a manuscript 

verb
  • To transcribe into typewritten form. 

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