| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | such a long period [prep] | 6 |
|
| 2 | such a long period [prep] | 6 |
|
| 3 | such a long period of | 5 |
|
| 4 | such a long period of | 5 |
|
| 5 | [prep] such a long period | 10 |
|
| 6 | [prep] such a long period | 10 |
|
| 7 | over such a long period | 5 |
|
| 8 | over such a long period | 5 |
|
