| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] a [adj] period [prep] | 13 |
|
| 2 | [adj] a [adj] period [prep] | 13 |
|
| 3 | such a [adj] period [prep] | 12 |
|
| 4 | such a [adj] period [prep] | 12 |
|
| 5 | [det] a [adj] period [prep] | 12 |
|
| 6 | [adj] a [adj] period of | 11 |
|
| 7 | [adj] a [adj] period of | 11 |
|
| 8 | [adj] a long period [prep] | 6 |
|
| 9 | [adj] a long period [prep] | 6 |
|
