| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a brief period of | 15 |
|
| 2 | [prep] a brief period of | 13 |
|
| 3 | [prep] a brief period of | 13 |
|
| 4 | [vb past] a brief period of | 9 |
|
| 5 | for a brief period of | 5 |
|
| 6 | for a brief period of | 5 |
|
| 7 | a brief period of [noun] | 23 |
|
| 8 | a brief period of [noun sg] | 22 |
|
| 9 | a brief period of [adj] | 9 |
|
| 10 | a brief period of [adj] | 8 |
|
