| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult for [noun] [to-vb] | 56 |
|
| 2 | be difficult for [noun] [to-vb] | 56 |
|
| 3 | been [adj] for [noun] [to-vb] | 34 |
|
| 4 | been [adj] for [noun] [to-vb] | 33 |
|
| 5 | been difficult [prep] [noun] [to-vb] | 6 |
|
| 6 | been difficult [prep] [noun] [to-vb] | 6 |
|
| 7 | been difficult for [noun] [to-vb] | 5 |
|
| 8 | [been] difficult for [noun] [to-vb] | 5 |
|
| 9 | been difficult for [noun] [verb] | 5 |
|
| 10 | been difficult for [noun] [to-vb] | 5 |
|
