| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [art] period | 90 |
|
| 2 | be [vb pp] [prep] a period | 61 |
|
| 3 | be [vb pp] [prep] a period | 61 |
|
| 4 | be [vb pp] [prep] the period | 28 |
|
| 5 | be [vb pp] [prep] the period | 28 |
|
| 6 | be [vb pp] over [art] period | 21 |
|
| 7 | be [vb pp] for [art] period | 20 |
|
| 8 | be [vb pp] within [art] period | 12 |
|
| 9 | be [vb pp] during [art] period | 9 |
|
| 10 | be [vb pp] as [art] period | 6 |
|
| 11 | be [vb pp] by [art] period | 5 |
|
