| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [n mass] [prep] | 365 |
|
| 2 | at [adv] [n mass] [prep] | 362 |
|
| 3 | [prep] about [n mass] [prep] | 326 |
|
| 4 | at about [noun] [prep] | 49 |
|
| 5 | at about [n mass] [prep] | 43 |
|
| 6 | at about [n mass] [prep] | 43 |
|
