| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [adj] period [prep] | 857 |
|
| 2 | over the [adj] period | 308 |
|
| 3 | over the period [prep] | 109 |
|
| 4 | over the [adj] [prep] | 48 |
|
| 5 | over [adj] period [prep] | 17 |
|
