| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a week [unc] | 285 |
|
| 2 | a week ['s] | 278 |
|
| 3 | a week 's | 274 |
|
| 4 | a week 's | 274 |
|
| 5 | a week [no cls] | 11 |
|
