| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a week [prep] [noun] | 594 |
|
| 2 | a [adv] [prep] [noun] | 235 |
|
| 3 | week [adv] [prep] [noun] | 132 |
|
| 4 | a week [adv] [prep] | 96 |
|
| 5 | a week [adv] [noun] | 35 |
|
