No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] how difficult it is for | 13 | |
2 | [vb base] how difficult it is for | 7 | |
3 | know how difficult it is for | 5 | |
4 | know how difficult it is for | 5 | |
5 | how difficult it is for [noun] | 8 | |
6 | how difficult it is for [noun pl] | 6 |