No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] [adv] over a long period | 11 |
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2 | [vb pp] [adv] over a long period | 7 |
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3 | [adv] over a long period [prep] | 9 |
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4 | [adv] over a long period [prep] | 9 |
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5 | [adv] over a long period of | 8 |
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6 | [adv] over a long period of | 8 |
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