| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] [vb pp] [prep] a period | 21 |
|
| 2 | [be] [adv] [vb pp] [prep] a period | 21 |
|
| 3 | is [adv] [vb pp] [prep] a period | 8 |
|
| 4 | [is] [adv] [vb pp] [prep] a period | 8 |
|
| 5 | [verb] [adv] [vb pp] [prep] a period | 6 |
|
| 6 | [was/were] [adv] [vb pp] [prep] a period | 5 |
|
| 7 | [adv] be [vb pp] [prep] a period | 15 |
|
| 8 | [adv] [be] [vb pp] [prep] a period | 15 |
|
| 9 | [adv] [be] [vb pp] [prep] a period | 11 |
|
| 10 | [adv] be [vb pp] [prep] a period | 11 |
|
| 11 | [adv] [vb pp] [prep] a [adj] period | 24 |
|
| 12 | [adv] [vb pp] [prep] a [adj] period | 22 |
|
| 13 | [adv] [vb pp] [prep] a long period | 7 |
|
| 14 | [adv] [vb pp] [prep] a long period | 6 |
|
| 15 | [adv] [vb pp] [prep] a period [prep] | 30 |
|
| 16 | [adv] [vb pp] [prep] a period [prep] | 30 |
|
| 17 | [adv] [vb pp] [prep] a period of | 29 |
|
| 18 | [adv] [vb pp] [prep] a period of | 29 |
|
