| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | place [prep] [art] period | 19 |
|
| 2 | place [prep] a period | 15 |
|
| 3 | place over [art] period | 10 |
|
| 4 | place [prep] the period | 5 |
|
| 5 | place during [art] period | 5 |
|
