| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [vb pp] over a [noun sg] | 18 |
|
| 2 | to be [vb pp] over a [noun] | 18 |
|
| 3 | to be [vb pp] [prep] a period | 17 |
|
| 4 | to be [vb pp] [prep] a period | 17 |
|
| 5 | to be [vb pp] over [art] period | 9 |
|
| 6 | to be [vb pp] over [art] period | 9 |
|
| 7 | to be [vb pp] over a period | 8 |
|
| 8 | to be [vb pp] over a period | 8 |
|
| 9 | [prep] be [vb pp] over a period | 8 |
|
| 10 | to be [vb pp] over a period | 8 |
|
| 11 | to [be] [vb pp] over a period | 8 |
|
| 12 | to be [verb] over a period | 8 |
|
