| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] such a [noun] [prep] | 541 |
|
| 2 | [prep] [adj] a period [prep] | 10 |
|
| 3 | [prep] [det] a period [prep] | 9 |
|
| 4 | [prep] such [art] period [prep] | 8 |
|
| 5 | [prep] such [art] period [prep] | 8 |
|
| 6 | [prep] such a period [prep] | 8 |
|
| 7 | [prep] such a period [prep] | 8 |
|
| 8 | [prep] such a period [prep] | 8 |
|
| 9 | [prep] such a period [prep] | 8 |
|
