SN4 ""

No	Pattern	Freq
1	[verb] so often	211
2	[verb] so often	211
3	have so often	77
4	[vb past] so often	60
5	[vb pp] so often	59
6	had so often	39
7	[vb base] so often	36
8	[vb -s] so often	29
9	has so often	18
10	do so often	17
11	have so often	15
12	[to-vb] so often	10
13	[vb infin] so often	9
14	use so often	8
15	done so often	8
16	[v-ing] so often	8
17	happen so often	7
18	hear so often	6
19	seem so often	5
20	change so often	5
21	heard so often	5
22	used so often	5