| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] period [prep] | 738 |
|
| 2 | over [art] [det] period | 184 |
|
| 3 | [art] [det] period [prep] | 140 |
|
| 4 | over [det] period [prep] | 15 |
|
