| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [noun] over [art] period | 25 |
|
| 2 | [verb] [prep] [noun] over a period | 20 |
|
| 3 | [verb] [prep] [noun sg] over [art] period | 12 |
|
| 4 | [vb pp] [prep] [noun] over [art] period | 10 |
|
| 5 | [verb] in [noun] over [art] period | 9 |
|
| 6 | [vb base] [prep] [noun] over [art] period | 5 |
|
| 7 | [verb] [prep] [noun] over the period | 5 |
|
| 8 | [verb] at [noun] over [art] period | 5 |
|
| 9 | [vb past] [prep] [noun] over [art] period | 5 |
|
