| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] occur over a | 12 |
|
| 2 | [noun sg] occur over a | 9 |
|
| 3 | occur over a [noun] | 10 |
|
| 4 | occur over a [noun sg] | 9 |
|
| 5 | occur over a [adj] | 7 |
|
| 6 | occur over a [adj] | 7 |
|
| 7 | occur over a period | 6 |
|
| 8 | occur over a period | 6 |
|
