| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [adv] a year | 44 |
|
| 2 | [adv prt] [adv] a year | 44 |
|
| 3 | in [adv] a year | 26 |
|
| 4 | [adv prt] over a year | 15 |
|
| 5 | [adv prt] about a year | 12 |
|
| 6 | [adv prt] under a year | 7 |
|
| 7 | out [adv] a year | 5 |
|
