SN4 ""

No	Pattern	Freq
1	[adj] difficulty in	556
2	[verb] difficulty in	438
3	have difficulty in	331
4	[art] difficulty in	297
5	[art] difficulty in	297
6	[adj] difficulty in	294
7	[det] difficulty in	219
8	no difficulty in	175
9	no difficulty in	175
10	great difficulty in	148
11	great difficulty in	118
12	the difficulty in	100
13	the difficulty in	100
14	[vb base] difficulty in	98
15	[vb past] difficulty in	98
16	[vb infin] difficulty in	84
17	had difficulty in	81
18	have difficulty in	73
19	some difficulty in	69
20	some difficulty in	69
21	little difficulty in	67
22	have difficulty in	64
23	little difficulty in	60
24	[prep] difficulty in	57
25	[v-ing] difficulty in	57
26	[prep] difficulty in	57
27	find difficulty in	55
28	[vb -s] difficulty in	41
29	having difficulty in	40
30	[vb pp] difficulty in	38