SN4 ""

No	Pattern	Freq
1	is often [verb] [prep]	984
2	is often [vb pp] [prep]	975
3	is often [verb] by	195
4	is often [verb] by	195
5	is often [verb] as	179
6	is often [verb] as	179
7	is often [verb] to	171
8	is often [verb] to	171
9	is often [verb] in	142
10	is often [verb] in	142
11	is often [verb] with	102
12	is often [verb] with	102
13	is often use [prep]	83
14	is often used [prep]	83
15	is often refer [prep]	49
16	is often referred [prep]	49
17	is often [verb] for	39
18	is often see [prep]	39
19	is often [verb] for	39
20	is often seen [prep]	39
21	is often [verb] on	29
22	is often [verb] on	29
23	is often associate [prep]	28
24	is often associated [prep]	28
25	is often [verb] of	23
26	is often [verb] of	23
27	is often [verb] at	22
28	is often [verb] at	22
29	is often taken [prep]	21
30	is often describe [prep]	21