| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] long period | 317 |
|
| 2 | [prep] such [art] long | 85 |
|
| 3 | [prep] such [art] period | 18 |
|
| 4 | such [art] long period | 13 |
|
