| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] on the | 127 |
|
| 2 | should concentrate on the | 17 |
|
| 3 | should focus on the | 13 |
|
| 4 | should depend on the | 6 |
|
| 5 | should err on the | 5 |
|
