| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] since the [num ord] | 5 |
|
| 2 | at least since the [num ord] | 5 |
|
| 3 | at [adv] since the [num ord] | 5 |
|
| 4 | at least since the [num ord] | 5 |
|
