| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] such a period [prep] | 5 |
|
| 2 | [prep] such a [adj] period [prep] | 8 |
|
| 3 | [prep] such a [adj] period [prep] | 8 |
|
| 4 | [prep] such a period [prep] [noun sg] | 7 |
|
| 5 | [prep] such a period [prep] [noun] | 7 |
|
| 6 | [prep] such a period [prep] time | 5 |
|
| 7 | [prep] such a period [prep] time | 5 |
|
