Eggcorn?

[Wilson Gray]

"on the heals": ca.162,000 Googlits for the phrase

_On the Heals_ of the Assault Force: Captain William Foster, Jr. QMC.
The Quartermaster Review, March-April 1994.

-Wilson
--
Everybody says, "How hard it is that we have to die"---a strange
complaint to come from the mouths of people who have had to live.
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Whoever has lived long enough to find out what life is knows how deep
a debt of gratitude we owe to Adam, the first great benefactor of our
race. He brought death into the world.

--Sam Clemens

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The American Dialect Society - http://www.americandialect.org