SN4 ""

No	Pattern	Freq
1	[noun] [conj] it is often [verb]	17
2	[noun sg] [conj] it is often [verb]	14
3	[adv] [conj] it is often [verb]	5
4	[conj] it is [adv] often [verb]	8
5	[conj] it is [adv] often [verb]	5
6	[conj] it is often [adj] [verb]	55
7	[conj] it is often [adj] [verb]	46
8	[conj] it is often difficult [verb]	22
9	[conj] it is often difficult [verb]	22
10	[conj] it is often [adj -er] [verb]	9
11	[conj] it is often easy [verb]	8
12	[conj] it is often easier [verb]	7
13	[conj] it is often necessary [verb]	6
14	[conj] it is often necessary [verb]	6
15	[conj] it is often possible [verb]	5
16	[conj] it is often possible [verb]	5
17	[conj] it is often [verb] [prep]	30
18	[conj] it is often [verb] [prep]	30
19	[conj] it is often [verb] [conj]	16
20	[conj] it is often [verb] that	14
21	[conj] it is often [verb] that	14
22	[conj] it is often [verb] [that]	14
23	[conj] it is often [verb] as	8
24	[conj] it is often [verb] as	8
25	[conj] it is often [verb] by	8
26	[conj] it is often [verb] by	8
27	[conj] it is often [verb] to	6
28	[conj] it is often [verb] to	6
29	[conj] it is often [verb] [adv]	6
30	[conj] it is often [verb] in	5