| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period | 289 |
|
| 2 | of [noun] over a [adj] | 78 |
|
| 3 | of [noun] over a period | 20 |
|
| 4 | of [noun] over [adj] period | 8 |
|
