SN4 ""

No	Pattern	Freq
1	be [adv] difficult find	77
2	[be] [adv] difficult find	77
3	[is] [adv] difficult find	38
4	is [adv] difficult find	29
5	be [adv] difficult find	20
6	[be] [adv] difficult find	20
7	[adv] [adv] difficult find	12
8	[adv] [adv] difficult find	11
9	[was/were] [adv] difficult find	10
10	it [adv] difficult find	9
11	are [adv] difficult find	9
12	it [adv] difficult find	9
13	[pron] [adv] difficult find	9
14	's [adv] difficult find	9
15	[pers pn] [adv] difficult find	9
16	[am/are] [adv] difficult find	9
17	was [adv] difficult find	8
18	[verb] [adv] difficult find	6
19	[adv] [adv] difficult find	12
20	[adv] [adv] difficult find	11
21	[adv] more difficult find	6
22	[adv] more difficult find	6
23	[adv] difficult find [art]	28
24	[adv] difficult find [art]	28
25	[adv] difficult find a	18
26	[adv] difficult find [adj]	17
27	[adv] difficult find [noun]	16
28	[adv] difficult find [adj]	14
29	[adv] difficult find a	13
30	[adv] difficult find [pron]	12