SN4 ""

No	Pattern	Freq
1	[noun] is base	1625
2	[noun sg] is base	1408
3	[pron] is base	537
4	[pers pn] is base	284
5	it is base	270
6	it is base	270
7	[Wh det] is base	205
8	which is base	205
9	which is base	205
10	[adj] is base	139
11	[noun pl] is base	100
12	[conj] is base	97
13	[noun prp] is base	90
14	[det] is base	88
15	[coord] is base	83
16	and is base	72
17	and is base	72
18	this is base	71
19	this is base	71
20	[verb] is base	37
21	system is base	35
22	system is base	33
23	who is base	31
24	[Wh pn] is base	31
25	who is base	31
26	[num] is base	28
27	[adv] is base	27
28	[adv] is base	26
29	analysis is base	22
30	analysis is base	22