| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] than a year | 300 |
|
| 2 | [adj] than a [adv] | 172 |
|
| 3 | than a year [adv] | 116 |
|
| 4 | [adj] a year [adv] | 84 |
|
