| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] over [art] [adj] period [prep] | 29 |
|
| 2 | [vb pp] over a [adj] period [prep] | 27 |
|
| 3 | [vb pp] over [art] [adj] period of | 24 |
|
| 4 | [vb pp] over [art] long period [prep] | 16 |
|
| 5 | [vb pp] over [art] long period [prep] | 13 |
|
| 6 | [vb pp] over the [adj] period [prep] | 8 |
|
