SN4 ""

No	Pattern	Freq
1	over a [noun] of	1158
2	over a [noun] of	1136
3	over a [noun sg] of	1133
4	over a period of	618
5	over a period of	618
6	over a number of	134
7	over a number of	134
8	over a range of	44
9	over a range of	44
10	over a [n mass] of	25
11	over a couple of	23
12	over a pan of	23
13	over a couple of	23
14	over a pan of	23
15	over an [noun] of	22
16	over a cup of	21
17	over a cup of	21
18	over a series of	18
19	over a series of	18
20	over a distance of	17
21	over a distance of	17
22	over a area of	13
23	over a area of	13
24	over a glass of	8
25	over a glass of	8
26	over a stretch of	7
27	over a pair of	7
28	over a bottle of	7
29	over a pair of	7
30	over a bottle of	7