| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] over a period [prep] time | 22 |
|
| 2 | [verb] over a [noun sg] of time | 22 |
|
| 3 | [verb] over a [noun sg] [prep] time | 22 |
|
| 4 | [verb] over a [noun sg] [prep] time | 22 |
|
| 5 | [verb] over a [noun sg] of time | 22 |
|
| 6 | [vb pp] over a [noun sg] [prep] time | 21 |
|
