| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] difficult believe [conj] | 46 |
|
| 2 | [is] believe [conj] [adj] | 42 |
|
| 3 | [is] difficult [conj] [adj] | 33 |
|
| 4 | difficult believe [conj] [adj] | 21 |
|
