| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] after a [adj] period of | 6 |
|
| 2 | [vb pp] after a [adj] period of | 5 |
|
| 3 | [vb pp] after a [noun sg] period of | 5 |
|
| 4 | [vb pp] after a [noun] period of | 5 |
|
