| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] a week | 1444 |
|
| 2 | [adv] a week | 1400 |
|
| 3 | exactly a [noun] | 136 |
|
| 4 | exactly a [noun sg] | 133 |
|
| 5 | exactly a week | 14 |
|
| 6 | exactly [art] week | 14 |
|
| 7 | exactly a week | 14 |
|
