| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at about [adj] | 730 |
|
| 2 | at about [num] | 684 |
|
| 3 | at [adv] four | 328 |
|
| 4 | [prep] about four | 152 |
|
| 5 | [prep] about four | 152 |
|
| 6 | at about four | 19 |
|
| 7 | at about four | 19 |
|
