| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [vb pp] [prep] a [adj] period | 8 |
|
| 2 | [vb past] [vb pp] [prep] a [adj] period | 8 |
|
| 3 | [vb past] [vb pp] a [adj] period [prep] | 5 |
|
| 4 | [vb past] [vb pp] a [adj] period [prep] | 5 |
|
