| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] over a [adj] period | 87 |
|
| 2 | [noun pl] over a long period | 24 |
|
| 3 | [noun pl] over an [adj] period | 7 |
|
| 4 | [noun pl] over a five-year period | 6 |
|
