SN4 ""

No	Pattern	Freq
1	once [prep]	2142
2	once in	826
3	once in	826
4	once upon	166
5	once upon	166
6	once on	151
7	once on	151
8	once to	117
9	once to	117
10	once with	108
11	once with	108
12	once at	106
13	once at	106
14	once for	105
15	once for	105
16	once by	68
17	once by	68
18	once during	58
19	once during	58
20	once inside	56
21	once inside	56
22	once from	36
23	once from	36
24	once of	33
25	once of	33
26	once per	30
27	once per	30
28	once as	29
29	once as	29
30	once into	26