| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] [det] of | 2807 |
|
| 2 | [prep] [det] period of | 233 |
|
| 3 | [vb pp] [prep] [det] period | 187 |
|
| 4 | [vb pp] [prep] period of | 49 |
|
