| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] three [noun] | 442 |
|
| 2 | at [adv] [adj] month | 241 |
|
| 3 | at [adv] [num] month | 237 |
|
| 4 | [prep] [adv] three month | 132 |
|
| 5 | [prep] [adv] three month | 132 |
|
| 6 | at [adv] three month | 40 |
|
| 7 | at [adv] three month | 40 |
|
| 8 | at [adv] three month | 40 |
|
