| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] such a period | 18 |
|
| 2 | in such a period | 5 |
|
| 3 | of such a period | 5 |
|
| 4 | over such a period | 5 |
|
| 5 | over such a period | 5 |
|
| 6 | in such a period | 5 |
|
| 7 | of such a period | 5 |
|
