| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] over a long period | 22 |
|
| 2 | be [vb pp] over a long period | 22 |
|
| 3 | been [vb pp] over a [adj] period | 8 |
|
| 4 | been [vb pp] over a long [noun] | 5 |
|
| 5 | been [vb pp] [prep] a long period | 5 |
|
| 6 | been [verb] over a long period | 5 |
|
| 7 | been [vb pp] over a long period | 5 |
|
| 8 | been [vb pp] over [art] long period | 5 |
|
| 9 | been [vb pp] over a long period | 5 |
|
| 10 | been [vb pp] over [art] long period | 5 |
|
| 11 | been [vb pp] [prep] a long period | 5 |
|
| 12 | [been] [vb pp] over a long period | 5 |
|
