filing vs sawdust

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. 

sawdust

noun
  • The fine particles (dust) created by sawing wood or other material. 

verb
  • To sprinkle with sawdust. 

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