EntryCommon
  1. Expressions (phrases, clauses, etc.), Noun which may take the genitive case particle 'no'

    to that extent; to that degree; that much; that many

    see あれほど

    あれだけのコインを収集するのにどれだけの年月がかかりましたか。
    How long did it take you to collect so many coins?
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