| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] over a period | 78 |
|
| 2 | make over a period | 5 |
|
| 3 | spread over a period | 5 |
|
| 4 | made over a period | 5 |
|
| 5 | spread over a period | 5 |
|
