| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem of the | 392 |
|
| 2 | problem with the | 323 |
|
| 3 | problem in the | 258 |
|
| 4 | problem for the | 224 |
|
| 5 | problem at the | 51 |
|
| 6 | problem to the | 36 |
|
| 7 | problem on the | 35 |
|
| 8 | problem about the | 26 |
|
| 9 | problem from the | 26 |
|
| 10 | problem by the | 16 |
|
| 11 | problem during the | 15 |
|
| 12 | problem as the | 11 |
|
| 13 | problem over the | 10 |
|
| 14 | problem within the | 9 |
|
| 15 | problem throughout the | 8 |
|
