| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] [noun] [unc] | 155 |
|
| 2 | [prep] a [det] [noun pl] [unc] | 141 |
|
| 3 | [prep] a [adj] months [unc] | 20 |
|
| 4 | [prep] a [det] month [unc] | 19 |
|
| 5 | [prep] [art] [det] months [unc] | 17 |
|
