particle vs whisper

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. 

whisper

noun
  • A faint trace or hint (of something). 

  • A private message to an individual in a chat room. 

  • A low rustling sound, like that of the wind in leaves. 

  • A rumor. 

  • The act of speaking in a quiet voice, especially, without vibration of the vocal cords. 

verb
  • To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound. 

  • To speak with suspicion or timorous caution; to converse in whispers, as in secret plotting. 

  • To make a low, sibilant sound. 

  • To mention privately and confidentially, or in a whisper. 

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