| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [unc] | 8407 |
|
| 2 | [prep] a [noun pl] [unc] | 641 |
|
| 3 | [prep] [art] seamen [unc] | 23 |
|
| 4 | [prep] a seaman [unc] | 14 |
|
