| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun pl] over a period | 48 |
|
| 2 | [noun pl] over a long period | 34 |
|
| 3 | [adj] [noun pl] over a long | 13 |
|
| 4 | [adj] over a long period | 6 |
|
