| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period of | 82 |
|
| 2 | [noun] over a long period of | 45 |
|
| 3 | [noun] [prep] a longer period of | 8 |
|
| 4 | [noun] [prep] a longer period of | 8 |
|
| 5 | [noun] over a [adj -er] period of | 6 |
|
| 6 | [noun] over a longer period [prep] | 5 |
|
| 7 | [noun] over a longer [noun] of | 5 |
|
| 8 | [noun] over a longer period of | 5 |
|
| 9 | [noun] over a longer period of | 5 |
|
| 10 | [noun] over [art] longer period of | 5 |
|
| 11 | [noun] over a longer period of | 5 |
|
| 12 | [noun] over a longer period [prep] | 5 |
|
| 13 | [noun] over a longer [noun sg] of | 5 |
|
