| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] over a [adj] period | 88 |
|
| 2 | [verb] [verb] over a [adj] | 46 |
|
| 3 | [verb] [verb] a [adj] period | 28 |
|
| 4 | [verb] [verb] over a period | 8 |
|
