| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [adv] difficult for | 17 |
|
| 2 | 's been [adv] [adj] for | 17 |
|
| 3 | have been [adv] difficult for | 17 |
|
| 4 | [vb -s] been [adv] difficult for | 11 |
|
| 5 | 's been [adv] difficult [prep] | 5 |
|
| 6 | 's be [adv] difficult for | 5 |
|
| 7 | 's [been] [adv] difficult for | 5 |
|
| 8 | 's been [adv] difficult for | 5 |
|
| 9 | 's [be] [adv] difficult for | 5 |
|
