| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] over [art] period [prep] | 130 |
|
| 2 | over [art] long period [prep] | 95 |
|
| 3 | [noun pl] over [art] long period | 34 |
|
| 4 | [noun pl] over long period [prep] | 7 |
|
