| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [adj] period [prep] time | 382 |
|
| 2 | over [art] [adj] period [prep] | 232 |
|
| 3 | over [art] period [prep] time | 188 |
|
| 4 | over [adj] period [prep] time | 6 |
|
