| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [art] long period of | 5 |
|
| 2 | [det] [art] long period of | 5 |
|
| 3 | such [art] long period of | 5 |
|
| 4 | [det] a long period of | 5 |
|
| 5 | [det] a long period of | 5 |
|
