| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the problem of [adv] | 144 |
|
| 2 | [art] problem of [Wh adv] | 122 |
|
| 3 | [art] problem of how | 102 |
|
| 4 | [art] problem of how | 102 |
|
| 5 | [art] problem of [adv] | 22 |
|
| 6 | [art] problem of where | 12 |
|
| 7 | [art] problem of where | 12 |
|
| 8 | [art] problem of why | 7 |
|
| 9 | [art] problem of why | 7 |
|
| 10 | [art] problem of not | 6 |
|
| 11 | [art] problem of [not/n't] | 6 |
|
| 12 | [art] problem of not | 6 |
|
| 13 | a problem of [adv] | 5 |
|
