| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [adj] period [prep] | 34 |
|
| 2 | [noun] [v-ing] a [adj] [prep] | 23 |
|
| 3 | [noun] a [adj] period [prep] | 10 |
|
| 4 | [noun] [v-ing] a [adj] period | 9 |
|
| 5 | [noun] [v-ing] a period [prep] | 9 |
|
