grater vs shredder

grater

noun
  • a tool with which one grates, especially foods such as cheese, to facilitate getting small particles or shreds off a solid lump 

shredder

noun
  • A machine that tears up objects into smaller pieces, especially a paper shredder, garbage shredder or gardening or farming shredder. 

  • One who shreds, or plays (especially the guitar) very fast. 

  • A program that overwrites deleted data to prevent recovery. 

  • Someone who snowboards; a snowboarder. 

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