| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] for [art] long period | 5 |
|
| 2 | be [vb pp] for [art] long period | 5 |
|
| 3 | [vb pp] for [art] long period [prep] | 6 |
|
| 4 | [vb pp] for [art] long period [prep] | 6 |
|
