| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] over a [adj] | 173 |
|
| 2 | [vb pp] over a [adj] period | 83 |
|
| 3 | be [vb pp] over a period | 46 |
|
| 4 | be [vb pp] over [adj] period | 5 |
|
| 5 | be [vb pp] a [adj] period | 5 |
|
