| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a week [adv] | 933 |
|
| 2 | a [adv] [noun sg] | 397 |
|
| 3 | a week [noun sg] | 115 |
|
| 4 | week [adv] [noun sg] | 22 |
|
