| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] over a [noun] | 175 |
|
| 2 | [prep] [noun] over a [noun sg] | 170 |
|
| 3 | [prep] [noun] [prep] a period | 155 |
|
| 4 | [prep] [noun] [prep] a period | 155 |
|
| 5 | [prep] [noun] over [art] period | 93 |
|
| 6 | [prep] [noun] over a period | 56 |
|
| 7 | [prep] [noun] over a period | 56 |
|
