enroll vs file

enroll

verb
  • To enlist (someone) or make (someone) a member of 

  • To enlist oneself (in something) or become a member (of something) 

  • To enter (a name, etc.) in a register, roll or list 

file

verb
  • To commit (official papers) to some office. 

  • To submit a formal request to some office. 

  • To corrupt. 

  • To store a file (aggregation of data) on a storage medium such as a disc or another computer. 

  • To place in an archive in a logical place and order. 

  • To smooth, grind, or cut with a file. 

  • To move in a file. 

  • To submit (a story) to a newspaper or similar publication. 

noun
  • A column of people one behind another, whether "single file" or in a grid pattern. 

  • A collection of papers collated and archived together. 

  • one of the eight vertical lines of squares on a chessboard (i.e., those identified by a letter). 

  • A hand tool consisting of a handle to which a block of coarse metal is attached, and used for removing sharp edges or for cutting, especially through metal. 

  • A row of modular kitchen units and a countertop, consisting of cabinets and appliances below (dishwasher) and next to (stove/cooker) a countertop. 

  • The primary item on the menu bar, containing commands such as open, save, print, etc. 

  • Course of thought; thread of narration. 

  • A roll or list. 

  • An aggregation of data on a storage device, identified by a name. 

  • A small detachment of soldiers. 

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