| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [adv] a [adj] period | 13 |
|
| 2 | [noun sg] [prep] [adv] a [adj] period | 10 |
|
| 3 | [verb] [prep] [adv] a [adj] period | 6 |
|
| 4 | [prep] [pers pn] [adv] a [adj] period | 6 |
|
| 5 | [prep] [pron] [adv] a [adj] period | 6 |
|
| 6 | [prep] [v-ing] [adv] a [adj] period | 5 |
|
| 7 | [prep] [verb] [adv] a [adj] period | 5 |
|
| 8 | [prep] [adv] a [adj] period [prep] | 12 |
|
| 9 | [prep] [adv] a [adj] period [prep] | 12 |
|
| 10 | [prep] [adv] a [adj] period of | 9 |
|
| 11 | [prep] [adv] a [adj] period of | 9 |
|
