envelope vs release

envelope

noun
  • The shape of a sound, which may be controlled by a synthesizer or sampler. 

  • Something that envelops; a wrapping. 

  • An enclosing structure or cover, such as a membrane; a space between two membranes 

  • A curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics. 

  • A mathematical curve, surface, or higher-dimensional object that is the tangent to a given family of lines, curves, surfaces, or higher-dimensional objects. 

  • A paper or cardboard wrapper used to enclose small, flat items, especially letters, for mailing. 

  • The nebulous covering of the head or nucleus of a comet; a coma. 

  • The set of limitations within which a technological system can perform safely and effectively. 

  • The information used for routing a message that is transmitted with the message but not part of its contents. 

  • An earthwork in the form of a single parapet or a small rampart, sometimes raised in the ditch and sometimes beyond it. 

  • A bag containing the lifting gas of a balloon or airship; fabric that encloses the gas-bags of an airship. 

release

noun
  • The act or manner of ending a sound. 

  • In the block system, a printed card conveying information and instructions to be used at intermediate sidings without telegraphic stations. 

  • The giving up of a claim, especially a debt. 

  • Anything recently released or made available (as for sale). 

  • A catch on a motor-starting rheostat, which automatically releases the rheostat arm and so stops the motor in case of a break in the field circuit. 

  • The catch on an electromagnetic circuit breaker for a motor, triggered in the event of an overload. 

  • The lever or button on a camera that opens the shutter to allow a photograph to be taken 

  • Orgasm. 

  • A kind of bridge used in jazz music. 

  • The distribution of an initial or new and upgraded version of a computer software product; the distribution can be either public or private. 

  • The process by which a chemical substance is set free. 

  • The event of setting (someone or something) free (e.g. hostages, slaves, prisoners, caged animals, hooked or stuck mechanisms). 

  • That which is released, untied or let go. 

  • Liberation from pain or suffering. 

verb
  • To set free a chemical substance. 

  • To let go (of); to cease to hold or contain. 

  • To make available to the public. 

  • To loosen; to relax; to remove the obligation of. 

  • To set up; to provide with a goal-scoring opportunity 

  • To free or liberate; to set free. 

  • (of a call) To hang up. 

  • To let go, as a legal claim; to discharge or relinquish a right to, as lands or tenements, by conveying to another who has some right or estate in possession, as when the person in remainder releases his right to the tenant in possession; to quit. 

  • to come out; be out. 

  • To discharge. 

  • To lease again; to grant a new lease of; to let back. 

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