| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [prep] a brief period | 9 |
|
| 2 | [conj] [prep] a brief period | 9 |
|
| 3 | [conj] for a brief period | 8 |
|
| 4 | [conj] for a brief period | 8 |
|
