| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a brief period [prep] | 36 |
|
| 2 | for a brief period [prep] | 21 |
|
| 3 | [prep] a brief period of | 13 |
|
| 4 | [prep] a brief period of | 13 |
|
| 5 | [prep] a brief period in | 9 |
|
| 6 | [prep] a brief period in | 9 |
|
| 7 | [prep] a brief period during | 6 |
|
| 8 | [prep] a brief period during | 6 |
|
| 9 | after a brief period [prep] | 6 |
|
