| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a long period | 34 |
|
| 2 | [verb] [conj] a long | 27 |
|
| 3 | [conj] a long period | 12 |
|
| 4 | [verb] [conj] a period | 10 |
|
