| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult it [is] [prep] | 24 |
|
| 2 | [Wh adv] difficult it [is] [prep] | 21 |
|
| 3 | how difficult it [is] [prep] | 21 |
|
| 4 | how difficult it [is] [prep] | 21 |
|
| 5 | difficult it [is] [verb] [prep] | 12 |
|
| 6 | difficult it [is] [to-vb] [prep] | 7 |
|
| 7 | difficult it [is] go [prep] | 5 |
|
| 8 | difficult it [is] [v-ing] [prep] | 5 |
|
| 9 | difficult it [is] going [prep] | 5 |
|
| 10 | difficult it [is] [prep] [noun] | 13 |
|
| 11 | difficult it [is] [prep] [noun pl] | 8 |
|
