| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] over a period of | 70 |
|
| 2 | [vb pp] over a number of | 32 |
|
| 3 | [vb pp] over a range of | 11 |
|
| 4 | made over a [noun sg] of | 8 |
|
| 5 | spread over a [noun sg] of | 8 |
|
| 6 | presided over a [noun sg] of | 5 |
|
