| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period | 519 |
|
| 2 | a [adj] period [coord] | 85 |
|
| 3 | over a [adj] [coord] | 18 |
|
| 4 | over [adj] period [coord] | 5 |
|
