fragment vs swarf

fragment

verb
  • To break apart. 

  • To break up and disperse (a file) into non-contiguous areas of a disk. 

  • To cause to be broken into pieces. 

noun
  • An incomplete portion of code. 

  • A sentence not containing a subject or a predicate. 

  • A portion of a URL referring to a subordinate resource or anchor (such as a specific point on a web page), introduced by the # sign. 

  • A part broken off; a small, detached portion; an imperfect part, either physically or not 

swarf

verb
  • To grind down. 

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

  • A particular waste chip or shaving. 

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