| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] over a [adj] period | 24 |
|
| 2 | [vb pp] [adv] over a [adj] period | 17 |
|
| 3 | phased [adv] over a [adj] period | 5 |
|
| 4 | phase [adv] over a [adj] period | 5 |
|
| 5 | [adv] over a [adj] period [prep] | 19 |
|
| 6 | [adv] over a [adj] period [prep] | 19 |
|
| 7 | [adv] over a [adj] period of | 13 |
|
| 8 | [adv] over a [adj] period of | 13 |
|
