| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] than a month | 82 |
|
| 2 | [det] than a month | 82 |
|
| 3 | [det] than [art] month | 82 |
|
| 4 | [det] than [art] month | 82 |
|
| 5 | less than [art] month | 53 |
|
| 6 | more than [art] month | 29 |
|
