| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at an [adj] [noun] | 1945 |
|
| 2 | [adv prt] an [adj] [noun] | 1074 |
|
| 3 | [adv prt] at [adj] [noun] | 349 |
|
| 4 | [adv prt] at an [adj] | 53 |
|
| 5 | [adv prt] at an [noun] | 40 |
|
