| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [vb pp] for a period | 10 |
|
| 2 | [modal v] be [vb pp] for a period | 10 |
|
| 3 | be [vb pp] for a [adj] period | 32 |
|
| 4 | be [vb pp] for a [adj] period | 28 |
|
| 5 | be [vb pp] for a short period | 5 |
|
| 6 | be [vb pp] for a limited period | 5 |
|
| 7 | be [vb pp] for a limited period | 5 |
|
| 8 | be [vb pp] for a period [prep] | 13 |
|
| 9 | be [vb pp] for a period [prep] | 13 |
|
| 10 | be [vb pp] for a period of | 11 |
|
| 11 | be [vb pp] for a period of | 11 |
|
