| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] a short period | 9 |
|
| 2 | [prep] [adj] a short period | 9 |
|
| 3 | [prep] such [art] short period | 9 |
|
| 4 | [prep] such [art] short period | 9 |
|
| 5 | [prep] [adj] [art] short period | 9 |
|
| 6 | [prep] [det] [art] short period | 9 |
|
