| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] for a | 3138 |
|
| 2 | [verb] for a period | 105 |
|
| 3 | [verb] [adv] a period | 75 |
|
| 4 | [adv] for a period | 37 |
|
