| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [prep] a period of | 132 |
|
| 2 | be [vb pp] [prep] a period of | 132 |
|
| 3 | [be] [vb pp] [prep] a period of | 50 |
|
| 4 | be [vb pp] [prep] a period of | 50 |
|
| 5 | [was/were] [vb pp] [prep] a period of | 37 |
|
| 6 | [adv] [vb pp] [prep] a period of | 29 |
|
| 7 | was [vb pp] [prep] a period of | 27 |
|
| 8 | [adv] [vb pp] [prep] a period of | 27 |
|
| 9 | [been] [vb pp] [prep] a period of | 19 |
|
| 10 | been [vb pp] [prep] a period of | 19 |
|
| 11 | [noun] [vb pp] [prep] a period of | 19 |
|
| 12 | [is] [vb pp] [prep] a period of | 18 |
|
| 13 | is [vb pp] [prep] a period of | 18 |
|
| 14 | [verb] [vb pp] [prep] a period of | 16 |
|
| 15 | have [vb pp] [prep] a period of | 15 |
|
| 16 | [noun pl] [vb pp] [prep] a period of | 12 |
|
| 17 | were [vb pp] [prep] a period of | 10 |
|
| 18 | [conj] [vb pp] [prep] a period of | 9 |
|
| 19 | [vb -s] [vb pp] [prep] a period of | 8 |
|
| 20 | has [vb pp] [prep] a period of | 8 |
|
| 21 | [noun sg] [vb pp] [prep] a period of | 6 |
|
| 22 | are [vb pp] [prep] a period of | 5 |
|
| 23 | [coord] [vb pp] [prep] a period of | 5 |
|
| 24 | [am/are] [vb pp] [prep] a period of | 5 |
|
| 25 | [vb pp] [adv] [prep] a period of | 31 |
|
| 26 | [vb pp] [adv prt] [prep] a period of | 20 |
|
| 27 | [vb pp] [adv] [prep] a period of | 10 |
|
| 28 | [vb pp] up [prep] a period of | 8 |
|
| 29 | [vb pp] up [prep] a period of | 8 |
|
| 30 | [vb pp] [prep] a [adj] period of | 87 |
|
