| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been trying [prep] [num] | 8 |
|
| 2 | [verb] been trying for [num] | 6 |
|
| 3 | [vb -s] been trying [prep] [num] | 5 |
|
| 4 | has been trying [prep] [num] | 5 |
|
