| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] long period [prep] time and | 7 |
|
| 2 | [art] long period of time and | 7 |
|
| 3 | [art] long period of time and | 7 |
|
| 4 | a long period [prep] time and | 7 |
|
| 5 | [art] long period [prep] time and | 7 |
|
| 6 | [art] long period [prep] time and | 7 |
|
| 7 | a long period [prep] time and | 7 |
|
