different between tentage vs centage

English

tent +? -age

tentage (countable and uncountable, plural tentages)

cent +? -age?

centage (plural centages)

Rate by the hundred; percentage.
- 1848, Thomas Chalmers, Miscellanies: Embracing Reviews, Essays, and Addresses (page 527)
  It would mightily advance the cause, and make direct taxation greatly more popular, were it carried into effect by a small centage on property, rather than by a centage twenty times larger on income — in other words were the tax on property alone, and not at all on income.

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