| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] period [prep] | 3127 |
|
| 2 | be [art] period [prep] | 233 |
|
| 3 | [prep] be [art] period | 19 |
|
| 4 | [prep] be [art] [prep] | 7 |
|
