| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a given period of time | 14 |
|
| 2 | [prep] a given period [prep] time | 14 |
|
| 3 | [prep] a given period [prep] time | 14 |
|
| 4 | over a given period [prep] time | 5 |
|
| 5 | over a given period [prep] time | 5 |
|
