No | Pattern | Freq | Relations |
---|---|---|---|
1 | [adj] hours difficulty | 12 |
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2 | [num] hours difficulty | 12 |
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3 | hours difficulty [num] | 12 |
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4 | hours difficulty [adj] | 12 |
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5 | hours difficulty 3 | 5 |
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6 | hours difficulty 3 | 5 |
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