No | Pattern | Freq | Relations |
---|---|---|---|
1 | [num] of [noun] [prep] a time | 5 |
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2 | [num] of [noun] at a time | 5 |
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3 | [num] of [noun] at a time | 5 |
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4 | [num] of [noun] [prep] a time | 5 |
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