| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] a long period [prep] | 32 |
|
| 2 | [vb pp] [prep] a long period [prep] | 32 |
|
| 3 | [vb pp] [prep] a long period of | 27 |
|
| 4 | [vb pp] [prep] a long period of | 27 |
|
| 5 | [vb pp] [prep] a long period [conj] | 7 |
|
| 6 | [vb pp] [prep] a long period [coord] | 6 |
|
| 7 | [vb pp] [prep] a long period and | 6 |
|
| 8 | [vb pp] [prep] a long period and | 6 |
|
| 9 | be [vb pp] [prep] a long period | 34 |
|
| 10 | [be] [vb pp] [prep] a long period | 34 |
|
| 11 | have [vb pp] [prep] a long period | 15 |
|
| 12 | [verb] [vb pp] [prep] a long period | 15 |
|
| 13 | be [vb pp] [prep] a long period | 14 |
|
| 14 | [be] [vb pp] [prep] a long period | 14 |
|
| 15 | [adv] [vb pp] [prep] a long period | 7 |
|
| 16 | [adv] [vb pp] [prep] a long period | 7 |
|
| 17 | [vb -s] [vb pp] [prep] a long period | 6 |
|
| 18 | has [vb pp] [prep] a long period | 6 |
|
| 19 | [been] [vb pp] [prep] a long period | 5 |
|
| 20 | was [vb pp] [prep] a long period | 5 |
|
| 21 | [noun] [vb pp] [prep] a long period | 5 |
|
| 22 | [was/were] [vb pp] [prep] a long period | 5 |
|
| 23 | been [vb pp] [prep] a long period | 5 |
|
| 24 | [conj] [vb pp] [prep] a long period | 5 |
|
| 25 | [vb pp] [adv] [prep] a long period | 9 |
|
| 26 | [vb pp] [adv] [prep] a long period | 6 |
|
