| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [prep] a long period | 9 |
|
| 2 | [coord] [prep] a long period | 9 |
|
| 3 | [coord] over a long period | 7 |
|
| 4 | [coord] over a long period | 7 |
|
| 5 | and [prep] a long period | 5 |
|
