| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [adj] period | 41 |
|
| 2 | following a [adj] period | 9 |
|
| 3 | [v-ing] a brief period | 5 |
|
| 4 | [v-ing] a brief period | 5 |
|
