| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] a long | 242 |
|
| 2 | [verb] a long period | 34 |
|
| 3 | [adv] [verb] a period | 33 |
|
| 4 | [adv] a long period | 8 |
|
