| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 773 |
|
| 2 | place [prep] a [adj] period | 12 |
|
| 3 | place [prep] a period [prep] | 11 |
|
| 4 | place [prep] a [adj] [prep] | 5 |
|
