| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [det] period | 131 |
|
| 2 | over this period | 76 |
|
| 3 | over this period | 76 |
|
| 4 | over that period | 50 |
|
| 5 | over that period | 50 |
|
