| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [noun sg] | 57363 |
|
| 2 | [adv] an [noun sg] | 5179 |
|
| 3 | [prep] [adv] [noun sg] | 3156 |
|
| 4 | [prep] [adv] an | 548 |
|
