different between metage vs meltage

English

mete +? -age

metage (countable and uncountable, plural metages)

Measurement, especially of coal.
- 1724-1727, Daniel Defoe, A Tour Through the Whole Island of Great Britain
  1 measurement or Metage of Coals
A fee paid for a measurement.
- 1858, City of London (England) Corporation, The Title of the Corporation of London to Its Metage Revenues, page 4,
  The corporation of London acquired its metage rights from the crown before the time of legal memory, and now holds them by the best of titles, prescriptive right and immemorial possession; for, except in those memorable periods in English history, the reigns of King John, King James the First, King Charles the Second, and King James the Second, the right and title of the corporation to its metage due has never been questioned or disturbed.

melt +? -age.

meltage (usually uncountable, plural meltages)

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