| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period | 2001 |
|
| 2 | [prep] a [adj] period | 1820 |
|
| 3 | [prep] a given [noun] | 1104 |
|
| 4 | [prep] [art] given period | 48 |
|
| 5 | [prep] a given period | 46 |
|
