| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] period of | 2328 |
|
| 2 | [vb pp] [prep] [art] period | 494 |
|
| 3 | [vb pp] [art] period of | 35 |
|
| 4 | [vb pp] [prep] [art] of | 11 |
|
