| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] [adj] period and | 30 |
|
| 2 | over a [adj] period and | 19 |
|
| 3 | over [art] long period and | 11 |
|
| 4 | over the [adj] period and | 10 |
|
| 5 | over [art] long period and | 10 |
|
