| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a period of | 652 |
|
| 2 | [noun] [prep] a period of | 652 |
|
| 3 | [noun] over a [noun] of | 549 |
|
| 4 | [noun] over a [noun sg] of | 540 |
|
| 5 | [noun] over [art] period of | 317 |
|
| 6 | [noun] over [art] period of | 317 |
|
| 7 | [noun] over a period [prep] | 295 |
|
| 8 | [noun] over a period of | 289 |
|
| 9 | [noun] over a period of | 289 |
|
| 10 | [noun] over a period of | 289 |
|
