| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a brief period [prep] [noun prp] | 7 |
|
| 2 | [prep] a brief period [prep] [noun prp] | 7 |
|
| 3 | for a brief period [prep] [noun prp] | 6 |
|
| 4 | for a brief period [prep] [noun prp] | 6 |
|
