| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem [coord] [no cls] | 24 |
|
| 2 | problem and [unc] | 15 |
|
| 3 | problem [coord] er | 15 |
|
| 4 | problem [coord] er | 15 |
|
| 5 | problem [coord] [unc] | 14 |
|
| 6 | problems [coord] [unc] | 10 |
|
| 7 | problem but [unc] | 7 |
|
| 8 | problem [coord] erm | 6 |
|
| 9 | problem [coord] erm | 6 |
|
