inbox vs text file

inbox

noun
  • A container in which papers to be dealt with are put. 

  • The aggregate of items that demand one's attention or effort. 

  • An electronic folder serving the same purpose, but for electronic files, especially email. 

verb
  • To put (something) in someone's inbox. 

  • To communicate with (a person) by writing to their electronic inbox. 

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. 

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