| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] [noun] [art] | 211 |
|
| 2 | [prep] a [det] [noun pl] [art] | 202 |
|
| 3 | [prep] [art] [det] weeks [art] | 14 |
|
| 4 | [prep] a [det] week [art] | 14 |
|
| 5 | [prep] a [adj] weeks [art] | 14 |
|
