| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a [adj] period [prep] | 180 |
|
| 2 | over a [adj] period [prep] | 176 |
|
| 3 | [verb] over a [adj] period | 86 |
|
| 4 | [verb] over a period [prep] | 76 |
|
| 5 | [verb] over [adj] period [prep] | 5 |
|
