fragment vs particle

fragment

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

  • 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. 

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. 

particle

noun
  • A very small piece of matter, a fragment; especially, the smallest possible part of something. 

  • A part of speech which cannot be inflected. 

  • A little bit. 

  • Any of various physical objects making up the constituent parts of an atom; an elementary particle or subatomic particle. 

  • A part of speech that has no inherent lexical definition but must be associated with another word to impart meaning, often a grammatical category: for example, the English word to in a full infinitive phrase (to eat) or O in a vocative phrase (O Canada), or as a discourse marker (mmm). 

  • In the Roman Catholic church, a crumb of consecrated bread; also the smaller breads used in the communion of the laity. 

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