"At no extra cost" vs "with no extra cost"

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Music by Eric Matyas
https://www.soundimage.org
Track title: Realization

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Chapters
00:00 &Quot;At No Extra Cost&Quot; Vs &Quot;With No Extra Cost&Quot;
00:16 Accepted Answer Score 2
00:35 Answer 2 Score 1
00:48 Thank you

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Full question
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Tags
#wordchoice

#avk47

ACCEPTED ANSWER

Score 2

Thanks to Dan Bron who clarified that both prepositions can be used, and taught me the correct use of the NGram Viewer.

According to that tool, "at" is by far the most used preposition:

ANSWER 2

Score 1

Un my opinion i think 'at no cost ' is more commonly used un British English un particular when we talk about 'financial cost. While 'with nom cost' may refer to 'saving efforts or risks'