filing vs swarf

filing

noun
  • Any particle that has been removed by a file or similar implement; a shaving. 

  • Something that has been officially filed; a document on file. 

  • The act of storing documents in an archive; archiving. 

swarf

noun
  • A particular waste chip or shaving. 

  • The waste chips or shavings from an abrasive activity, such as metalworking, a saw cutting wood, or the use of a grindstone or whetstone. 

verb
  • To grind down. 

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