snail's pace

snail's pace idiom
A very slow pace, as in They're making progress with testing the new vaccine, but at a snail's pace. [c. 1400]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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