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Idioms and Phrases:

Acid test

The idiom: Acid test
Meaning: An acid test is something that proves whether something is good, effective, etc, or not.
Key Words: [ acid ] [ test ]

Usage History of [Acid test]:

This graph is generated by Google Ngram Viewer which is based on statistics from Google Books, that charts frequencies of any word or short sentence using yearly counts found in the sources printed between 1800 and 2008 in American and British English.

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