| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] over a [adj] period | 98 |
|
| 2 | [vb pp] over a [adj] period | 83 |
|
| 3 | [noun pl] [vb pp] over a [adj] | 23 |
|
| 4 | [noun pl] [vb pp] over a period | 7 |
|
