| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at least [prep] so far | 14 |
|
| 2 | at least [prep] so far | 14 |
|
| 3 | at [adv] in so far | 14 |
|
| 4 | at [adv] [prep] so far | 14 |
|
