| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] over a [adj] period and | 7 |
|
| 2 | [vb pp] over a [adj] period and | 6 |
|
| 3 | [vb pp] over a [adj] period and | 6 |
|
| 4 | [vb pp] over a long period and | 6 |
|
| 5 | [vb pp] over a long period and | 5 |
|
