| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] over a [adj] period | 52 |
|
| 2 | [be] [vb pp] over a [adj] period | 42 |
|
| 3 | [be] [vb pp] over a long period | 22 |
|
| 4 | be [vb pp] over a [adj] period | 21 |
|
| 5 | [be] [vb pp] over a [adj] period | 21 |
|
| 6 | [be] [vb pp] over a long period | 14 |
|
| 7 | [be] [vb pp] over a [adj -er] period | 10 |
|
| 8 | [was/were] [vb pp] over a [adj] period | 9 |
|
| 9 | are [vb pp] over a [adj] period | 8 |
|
| 10 | [be] [vb pp] over a longer period | 8 |
|
| 11 | been [vb pp] over a [adj] period | 8 |
|
| 12 | [am/are] [vb pp] over a [adj] period | 8 |
|
| 13 | [been] [vb pp] over a [adj] period | 8 |
|
| 14 | [be] [vb pp] over a three-year period | 5 |
|
| 15 | [is] [vb pp] over a [adj] period | 5 |
|
| 16 | was [vb pp] over a [adj] period | 5 |
|
| 17 | is [vb pp] over a [adj] period | 5 |
|
| 18 | [be] [vb pp] over a three-year period | 5 |
|
