| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] | 1199 |
|
| 2 | over a [adj] period | 545 |
|
| 3 | [noun] over a period | 311 |
|
| 4 | [noun] over [adj] period | 69 |
|
| 5 | [noun] a [adj] period | 15 |
|
