| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period | 545 |
|
| 2 | over [adj] a [adj] | 40 |
|
| 3 | [adj] a [adj] period | 36 |
|
| 4 | over [adj] [adj] period | 18 |
|
| 5 | over [adj] a period | 5 |
|
