| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [art] period [prep] time | 35 |
|
| 2 | [verb] [prep] [art] period of time | 35 |
|
| 3 | [verb] [prep] a period [prep] time | 31 |
|
| 4 | [vb pp] [prep] [art] period [prep] time | 28 |
|
| 5 | [verb] over [art] period [prep] time | 23 |
|
| 6 | [verb] over [art] period [prep] time | 23 |
|
