No | Pattern | Freq | Relations |
---|---|---|---|
1 | difficult [to-vb] at [adj] [noun sg] | 17 | |
2 | difficult [to-vb] at [det] [noun] | 13 | |
3 | difficult [to-vb] at this [noun] | 8 | |
4 | difficult [to-vb] at this [noun] | 8 | |
5 | difficult [to-vb] at [adj] stage | 5 | |
6 | difficult [to-vb] at [adj] [noun] | 5 | |
7 | difficult [to-vb] at [adj] stage | 5 |