| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] [prep] a period of | 61 |
|
| 2 | [vb pp] [adv] [prep] a period of | 31 |
|
| 3 | [noun] [adv] [prep] a period of | 14 |
|
| 4 | [noun sg] [adv] [prep] a period of | 10 |
|
| 5 | [conj] [adv] [prep] a period of | 10 |
|
| 6 | [adv] [adv] [prep] a period of | 10 |
|
| 7 | [coord] [adv] [prep] a period of | 9 |
|
| 8 | [vb past] [adv] [prep] a period of | 8 |
|
| 9 | [be] [adv] [prep] a period of | 6 |
|
| 10 | be [adv] [prep] a period of | 6 |
|
| 11 | [adv] [adv] [prep] a period of | 6 |
|
| 12 | [to-vb] [adv] [prep] a period of | 5 |
|
| 13 | and [adv] [prep] a period of | 5 |
|
| 14 | and [adv] [prep] a period of | 5 |
|
| 15 | [vb -s] [adv] [prep] a period of | 5 |
|
| 16 | [v-ing] [adv] [prep] a period of | 5 |
|
| 17 | [adv] [verb] [prep] a period of | 39 |
|
| 18 | [adv] [vb pp] [prep] a period of | 29 |
|
| 19 | [adv] [adv] [prep] a period of | 10 |
|
| 20 | [adv] [adv] [prep] a period of | 8 |
|
| 21 | [adv] [adj] [prep] a period of | 7 |
|
| 22 | [adv] [adj] [prep] a period of | 5 |
|
| 23 | [adv] [noun] [prep] a period of | 5 |
|
| 24 | [adv] [prep] a [adj] period of | 57 |
|
| 25 | [adv] [prep] a [adj] period of | 55 |
|
| 26 | [adv] [prep] a long period of | 15 |
|
| 27 | [adv] [prep] a long period of | 15 |
|
| 28 | [adv] [prep] a short period of | 8 |
|
| 29 | [adv] [prep] a short period of | 8 |
|
| 30 | [adv] [prep] a continuous period of | 5 |
|
