| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] over a [num] [noun] period | 22 |
|
| 2 | [verb] over a [num] [noun sg] period | 22 |
|
| 3 | [verb] [prep] a [num] year period | 14 |
|
| 4 | [verb] [prep] a [num] year period | 14 |
|
| 5 | [verb] over [art] [num] year period | 12 |
|
| 6 | [verb] over [art] [num] year period | 12 |
|
| 7 | [verb] over a [num] year [noun] | 9 |
|
| 8 | [verb] over a [num] year [noun sg] | 9 |
|
| 9 | [verb] over a [num] year period | 8 |
|
| 10 | [verb] over a [adj] year period | 8 |
|
| 11 | [verb] over a [num] year period | 8 |
|
| 12 | [verb] over a [num] year period | 8 |
|
| 13 | [verb] over a [num] year period | 8 |
|
