| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] at least a [noun] | 220 |
|
| 2 | [prep] at least a [noun] | 220 |
|
| 3 | [prep] at [adv] a [noun] | 220 |
|
| 4 | [prep] at [adv] a [noun sg] | 218 |
|
| 5 | [prep] at [adv] a [noun] | 196 |
|
| 6 | for at [adv] a [noun] | 150 |
|
| 7 | [prep] at [adv] a year | 39 |
|
| 8 | [prep] at [adv] a year | 39 |
|
| 9 | [prep] at [adv] a month | 29 |
|
| 10 | [prep] at [adv] a month | 29 |
|
| 11 | [prep] at [adv] an [noun] | 24 |
|
| 12 | [prep] at [adv] a hour | 20 |
|
| 13 | [prep] at [adv] a hour | 20 |
|
| 14 | [prep] at [adv] a week | 20 |
|
| 15 | [prep] at [adv] a week | 20 |
|
| 16 | of at [adv] a [noun] | 18 |
|
| 17 | by at [adv] a [noun] | 17 |
|
| 18 | [prep] at [adv] a decade | 15 |
|
| 19 | [prep] at [adv] a decade | 15 |
|
| 20 | with at [adv] a [noun] | 14 |
|
| 21 | [prep] at [adv] a quarter | 9 |
|
| 22 | [prep] at [adv] a quarter | 9 |
|
| 23 | [prep] at [adv] a century | 8 |
|
| 24 | [prep] at [adv] a century | 8 |
|
| 25 | [prep] at [adv] a fortnight | 7 |
|
| 26 | [prep] at [adv] a fortnight | 7 |
|
| 27 | [prep] at [adv] a couple | 6 |
|
| 28 | [prep] at [adv] a couple | 6 |
|
| 29 | to at [adv] a [noun] | 5 |
|
| 30 | [prep] at [adv] a minute | 5 |
|
