SN4 ""

No	Pattern	Freq
1	[pron] is often [verb] [conj]	178
2	[pers pn] is often [verb] [conj]	166
3	it is often [verb] [conj]	163
4	it is often [verb] [conj]	163
5	[noun] is often [verb] [conj]	78
6	[noun sg] is often [verb] [conj]	67
7	[Wh det] is often [verb] [conj]	10
8	[conj] is often [verb] [conj]	7
9	[noun prp] is often [verb] [conj]	7
10	[adj] is often [verb] [conj]	6
11	which is often [verb] [conj]	6
12	which is often [verb] [conj]	6
13	[det] is often [verb] [conj]	5
14	is [adv] often [verb] [conj]	28
15	is [adv] often [verb] [conj]	23
16	is not often [verb] [conj]	5
17	is too often [verb] [conj]	5
18	is [not/n't] often [verb] [conj]	5
19	is too often [verb] [conj]	5
20	is not often [verb] [conj]	5
21	is often [adv] [verb] [conj]	15
22	is often [adv] [verb] [conj]	13
23	is often [adj] [verb] [conj]	10
24	is often [adj] [verb] [conj]	10
25	is often difficult [verb] [conj]	6
26	is often [verb] [verb] [conj]	6
27	is often [vb pp] [verb] [conj]	6
28	is often difficult [verb] [conj]	6
29	is often [verb] [adv] [conj]	19
30	is often [verb] [adv] [conj]	10