| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period [prep] | 295 |
|
| 2 | [noun] over a [adj] period | 289 |
|
| 3 | over a [adj] period [prep] | 176 |
|
| 4 | [noun] a [adj] period [prep] | 10 |
|
| 5 | [noun] over [adj] period [prep] | 7 |
|
| 6 | [noun] over a [adj] [prep] | 5 |
|
