| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] [noun sg] | 1659 |
|
| 2 | over a [adj] period | 519 |
|
| 3 | a [adj] [noun sg] period | 428 |
|
| 4 | over [adj] [noun sg] period | 12 |
|
| 5 | over a [noun sg] period | 12 |
|
