| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] over a | 256 |
|
| 2 | [verb] over a period | 83 |
|
| 3 | [verb] [adv] a period | 75 |
|
| 4 | [adv] over a period | 69 |
|
