SN4 ""

No	Pattern	Freq
1	it [be] often [verb] [adv] [conj]	7
2	it [be] often [verb] that [conj]	7
3	it [be] often [verb] that [conj]	7
4	it [be] often [verb] [conj] [conj]	7
5	it [be] often [verb] [that] [conj]	7
6	it [be] often [verb] out [conj]	6
7	it [be] often [verb] [adv prt] [conj]	6
8	it [be] often [verb] out [conj]	6
9	[conj] it [be] often [verb] [conj]	21
10	[coord] it [be] often [verb] [conj]	12
11	[subord] it [be] often [verb] [conj]	8
12	[noun] it [be] often [verb] [conj]	7
13	[noun sg] it [be] often [verb] [conj]	6
14	and it [be] often [verb] [conj]	6
15	but it [be] often [verb] [conj]	6
16	and it [be] often [verb] [conj]	6
17	but it [be] often [verb] [conj]	6
18	it [be] [adv] often [verb] [conj]	11
19	it [be] [adv] often [verb] [conj]	8
20	it [be] often [adj] [verb] [conj]	9
21	it [be] often [adj] [verb] [conj]	9
22	it [be] often difficult [verb] [conj]	6
23	it [be] often difficult [verb] [conj]	6
24	it [be] often [verb] [conj] [art]	53
25	it [be] often [verb] [conj] [art]	53
26	it [be] often [verb] [conj] [noun]	44
27	it [be] often [verb] [conj] the	43
28	it [be] often [verb] [conj] the	43
29	it [be] often [verb] [conj] [adj]	34
30	it [be] often [verb] [conj] [pron]	26