SN4 ""

No	Pattern	Freq
1	[conj] it is often [verb] [prep]	30
2	[subord] it is often [verb] [prep]	14
3	[that] it is often [verb] [prep]	8
4	[coord] it is often [verb] [prep]	8
5	that it is often [verb] [prep]	8
6	that it is often [verb] [prep]	8
7	and it is often [verb] [prep]	6
8	as it is often [verb] [prep]	6
9	[noun] it is often [verb] [prep]	6
10	[noun sg] it is often [verb] [prep]	6
11	and it is often [verb] [prep]	6
12	as it is often [verb] [prep]	6
13	it is [adv] often [verb] [prep]	16
14	it is [adv] often [verb] [prep]	16
15	it is often [adj] [verb] [prep]	31
16	it is often [adj] [verb] [prep]	27
17	it is often difficult [verb] [prep]	10
18	it is often difficult [verb] [prep]	10
19	it is often [verb] [adv] [prep]	7
20	it is often [verb] [prep] [prep]	6
21	it is often [verb] [prep] [prep]	6
22	it is often [verb] to [prep]	5
23	it is often [verb] to [prep]	5
24	it is often [verb] [prep] [art]	41
25	it is often [verb] [prep] [art]	41
26	it is often [verb] [prep] [noun]	27
27	it is often [verb] [prep] a	26
28	it is often [verb] [prep] a	23
29	it is often [verb] [prep] [adj]	15
30	it is often [verb] [prep] [noun sg]	15