No | Pattern | Freq | Relations |
---|---|---|---|
1 | difficulty [prep] [v-ing] to the [adj] | 7 | |
2 | difficulty [prep] [v-ing] to the [adj] | 7 | |
3 | difficulty [prep] [v-ing] to the [adj] | 6 | |
4 | difficulty in [v-ing] to the [adj] | 6 | |
5 | difficulty in [v-ing] to the [adj] | 6 |