| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] period since [adj] | 6 |
|
| 2 | over [art] period since [adj] | 6 |
|
| 3 | over the period since [adj] | 6 |
|
| 4 | over the period since [adj] | 6 |
|
| 5 | over [art] period since [num] | 5 |
|
