SN4 ""

No	Pattern	Freq
1	it [be] [adv] often [conj]	22
2	it [be] not often [conj]	20
3	it [be] [not/n't] often [conj]	20
4	it [be] not often [conj]	15
5	it [be] n't often [conj]	5
6	it [be] often [vb pp] [conj]	181
7	it [be] often [verb] [conj]	181
8	it [be] often say [conj]	51
9	it [be] often said [conj]	51
10	it [be] often assume [conj]	27
11	it [be] often assumed [conj]	27
12	it [be] often [adj] [conj]	18
13	it [be] often argued [conj]	18
14	it [be] often argue [conj]	18
15	it [be] often [adj] [conj]	13
16	it [be] often claim [conj]	12
17	it [be] often claimed [conj]	12
18	it [be] often suggested [conj]	9
19	it [be] often suggest [conj]	9
20	it [be] often forget [conj]	7
21	it [be] often forgotten [conj]	7
22	it [be] often [noun] [conj]	6
23	it [be] often found [conj]	5
24	it [be] often find [conj]	5
25	it [be] often think [conj]	5
26	it [be] often thought [conj]	5