| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] over a [noun sg] of | 34 |
|
| 2 | [be] [vb pp] over a period of | 15 |
|
| 3 | [be] [vb pp] over a number of | 12 |
|
| 4 | [be] [vb pp] over a range of | 5 |
|
