| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] least [adv] a year | 45 |
|
| 2 | [prep] least [adv] a year | 45 |
|
| 3 | at least [adv] a year | 45 |
|
| 4 | at least [adv] a year | 45 |
|
| 5 | least [adv] a year [conj] | 7 |
|
| 6 | least [adv] a year and | 6 |
|
| 7 | least [adv] a year [coord] | 6 |
|
| 8 | least [adv] a year and | 6 |
|
