| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period | 519 |
|
| 2 | over a [adj] period | 462 |
|
| 3 | [prep] a short period | 178 |
|
| 4 | [prep] a short period | 178 |
|
| 5 | over a short [noun] | 25 |
|
| 6 | over a short period | 18 |
|
| 7 | over [art] short period | 15 |
|
| 8 | over [art] short period | 15 |
|
| 9 | over a short period | 14 |
|
| 10 | over a short period | 14 |
|
