| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] then there | 58 |
|
| 2 | [prep] then there | 58 |
|
| 3 | [prep] then there | 58 |
|
| 4 | since then there | 35 |
|
| 5 | since then there | 35 |
|
| 6 | by then there | 7 |
|
| 7 | by then there | 7 |
|
