| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period | 311 |
|
| 2 | [noun prp] over a [noun] | 55 |
|
| 3 | [noun prp] [prep] a period | 40 |
|
| 4 | [noun prp] [prep] a period | 40 |
|
| 5 | [noun prp] over [art] period | 25 |
|
| 6 | [noun prp] over [art] period | 25 |
|
| 7 | [noun prp] over a period | 12 |
|
| 8 | [noun prp] over a period | 12 |
|
