No | Pattern | Freq | Relations |
---|---|---|---|
1 | difficult [to-vb] [prep] [adj] [noun] | 219 | |
2 | difficult [to-vb] [prep] [adj] [noun] | 219 | |
3 | [adj] [to-vb] at [adj] [noun] | 206 | |
4 | [adj] [to-vb] at [adj] [noun] | 194 | |
5 | difficult [verb] at [adj] [noun] | 19 | |
6 | difficult [to-vb] at [adj] [noun] | 19 | |
7 | difficult [to-vb] at [adj] [noun] | 19 |