| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] over a [adj] period | 58 |
|
| 2 | [prep] [noun] over a [adj] period | 51 |
|
| 3 | [prep] [noun] over a long period | 31 |
|
| 4 | [prep] [noun] over a long period | 25 |
|
| 5 | [prep] [noun] over a [adj -er] period | 7 |
|
| 6 | [prep] [noun] over a longer period | 6 |
|
| 7 | [noun] [prep] [noun] over a period | 30 |
|
| 8 | [verb] [prep] [noun] over a period | 20 |
|
| 9 | [noun sg] [prep] [noun] over a period | 19 |
|
| 10 | [noun pl] [prep] [noun] over a period | 9 |
|
| 11 | [vb pp] [prep] [noun] over a period | 8 |
|
| 12 | [prep] [art] [noun] over a period | 38 |
|
| 13 | [prep] [art] [noun] over a period | 38 |
|
| 14 | [prep] [adj] [noun] over a period | 36 |
|
| 15 | [prep] the [noun] over a period | 31 |
|
| 16 | [prep] the [noun] over a period | 31 |
|
| 17 | [prep] [adj] [noun] over a period | 25 |
|
| 18 | [prep] [noun] [noun] over a period | 10 |
|
| 19 | [prep] a [noun] over a period | 7 |
|
| 20 | [prep] [det] [noun] over a period | 7 |
|
| 21 | [prep] [noun sg] [noun] over a period | 6 |
|
| 22 | [prep] [pos pn] [noun] over a period | 5 |
|
| 23 | [prep] [pron] [noun] over a period | 5 |
|
| 24 | [prep] [noun] [noun] over a period | 10 |
|
| 25 | [prep] [noun] over a period [prep] | 51 |
|
| 26 | [prep] [noun] over a period [prep] | 51 |
|
| 27 | [prep] [noun] over a period of | 49 |
|
| 28 | [prep] [noun] over a period of | 49 |
|
