| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] a brief [noun] | 105 |
|
| 2 | [conj] a brief [noun sg] | 105 |
|
| 3 | [conj] a [adj] period | 77 |
|
| 4 | [conj] a brief period | 6 |
|
| 5 | [conj] [art] brief period | 6 |
|
| 6 | [conj] a brief period | 6 |
|
| 7 | [conj] [art] brief period | 6 |
|
