| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] over a [adj] period | 51 |
|
| 2 | of [noun] over a [adj] period | 31 |
|
| 3 | [prep] [noun sg] over a [adj] period | 31 |
|
| 4 | [prep] [noun] over a long period | 25 |
|
| 5 | [prep] [noun pl] over a [adj] period | 12 |
|
| 6 | in [noun] over a [adj] period | 8 |
|
| 7 | [prep] [noun prp] over a [adj] period | 6 |
|
| 8 | to [noun] over a [adj] period | 5 |
|
