| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after a long period [prep] | 19 |
|
| 2 | after a long period [prep] | 19 |
|
| 3 | after a long period [prep] | 19 |
|
| 4 | after a long period of | 16 |
|
| 5 | after a long period of | 16 |
|
