cade

In England, 15th – 18th centuries, a unit based on a small cask. Though it is mentioned in connection with grains, it was largely a unit of count for fish.

As a unit of count, the cade was associated with a special definition of "hundred." In 1502, Arnold stated there were 5 hundred in a cade, with 6 score 4 herrings for the hundred, that is, 620 herrings in a cade.

Compare mease.

Two centuries later Worlidge (see below) gives much the same definition.

Richard Arnold.
The Customs of England, otherwise called Arnold's Chronicle....
London, 1502, reprinted 1811.

Sources

CADE; is a Measure, viz. of Red-herrings 500, Sprats 1000; yet I find anciently 600 made the Cade of Herrings, Six score to the Hundred, which is called Magnum Centum.

Worlidge, 1704.

Using the long hundred, “500”, five hundred, is 600, and ten hundred is 1200.