| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after a [adj] period [prep] | 80 |
|
| 2 | [adv] a [adj] period [prep] | 53 |
|
| 3 | [adv] after a period [prep] | 17 |
|
| 4 | [adv] after a [adj] period | 13 |
|
