| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period of | 954 |
|
| 2 | a brief [noun] of | 550 |
|
| 3 | a brief [noun sg] of | 542 |
|
| 4 | a brief period [prep] | 63 |
|
| 5 | a brief period [prep] | 63 |
|
| 6 | [art] brief period of | 40 |
|
| 7 | a brief period of | 34 |
|
| 8 | a brief period of | 34 |
|
