| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] [art] period | 38 |
|
| 2 | [been] [vb pp] [prep] [art] period | 38 |
|
| 3 | [been] [vb pp] [prep] a period | 25 |
|
| 4 | [been] [vb pp] [prep] a period | 25 |
|
| 5 | [been] [vb pp] [prep] the period | 13 |
|
| 6 | [been] [vb pp] [prep] the period | 13 |
|
| 7 | [been] [vb pp] in [art] period | 9 |
|
| 8 | [been] [vb pp] for [art] period | 6 |
|
| 9 | [been] [vb pp] by [art] period | 6 |
|
| 10 | [been] [vb pp] during [art] period | 5 |
|
| 11 | [been] [vb pp] over [art] period | 5 |
|
