| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adv] [adj] period of | 61 |
|
| 2 | [prep] a [adv] [adj] period of | 61 |
|
| 3 | for a [adv] [adj] period of | 19 |
|
| 4 | for a [adv] [adj] period of | 19 |
|
| 5 | in a [adv] [adj] period of | 14 |
|
| 6 | in a [adv] [adj] period of | 14 |
|
| 7 | [verb] a [adv] [adj] period of | 10 |
|
| 8 | over a [adv] [adj] period of | 8 |
|
| 9 | [be] a [adv] [adj] period of | 8 |
|
| 10 | over a [adv] [adj] period of | 8 |
|
| 11 | be a [adv] [adj] period of | 8 |
|
| 12 | within a [adv] [adj] period of | 7 |
|
| 13 | within a [adv] [adj] period of | 7 |
|
| 14 | [conj] a [adv] [adj] period of | 6 |
|
| 15 | a [adv] [adj] period of [noun sg] | 69 |
|
| 16 | a [adv] [adj] period of [noun] | 69 |
|
| 17 | a [adv] [adj] period of time | 53 |
|
| 18 | a [adv] [adj] period of time | 53 |
|
| 19 | a [adv] [adj] period of [adj] | 10 |
|
| 20 | a [adv] [adj] period of [adj] | 10 |
|
| 21 | a [adv] [adj] period of [pos pn] | 6 |
|
| 22 | a [adv] [adj] period of [pron] | 6 |
|
