| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [unc] | 2232 |
|
| 2 | [prep] a [no cls] | 2228 |
|
| 3 | [prep] [art] 15,000-word | 6 |
|
| 4 | [prep] a 15,000-word | 6 |
|
