noun
EXAMPLES FROM CORPUS
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After two years he received the certificate of the college for proficiency in chemistry.
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Breadth of knowledge will be more important than technical proficiency .
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He spent days just gaining a proficiency with the typewriter.
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Once children have achieved a certain proficiency as a reader, they prefer to read silently.
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Second, his indifference to business proficiency as a qualification for his closest companions.
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The principal component, as always, is lack of language proficiency .