| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] a [adj] period | 34 |
|
| 2 | [det] a [adj] period | 33 |
|
| 3 | such a [adj] period | 32 |
|
| 4 | such a [adj] period | 32 |
|
| 5 | [adj] a long period | 13 |
|
| 6 | [adj] a long period | 13 |
|
| 7 | [adj] a short period | 10 |
|
| 8 | [adj] a short period | 10 |
|
