| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] how old | 14 |
|
| 2 | [prep] how old | 14 |
|
| 3 | [prep] how old | 11 |
|
| 4 | of how old | 5 |
|
| 5 | of how old | 5 |
|
