| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] the problem of | 733 |
|
| 2 | [prep] the problems of | 661 |
|
| 3 | to the problem of | 427 |
|
| 4 | of the problem of | 304 |
|
| 5 | with the problem of | 273 |
|
| 6 | on the problem of | 83 |
|
| 7 | about the problem of | 61 |
|
| 8 | in the problem of | 42 |
|
| 9 | by the problem of | 31 |
|
| 10 | from the problem of | 29 |
|
| 11 | for the problem of | 23 |
|
| 12 | into the problem of | 19 |
|
| 13 | at the problem of | 18 |
|
| 14 | over the problem of | 10 |
|
| 15 | despite the problem of | 10 |
|
| 16 | round the problem of | 8 |
|
| 17 | as the problem of | 7 |
|
| 18 | upon the problem of | 7 |
|
| 19 | against the problem of | 6 |
|
| 20 | without the problem of | 6 |
|
