No | Pattern | Freq | Relations |
---|---|---|---|
1 | over a period [prep] [noun] | 296 | |
2 | over a period [prep] [adj] | 226 | |
3 | over a period [prep] [num] | 192 | |
4 | over a period [prep] [noun sg] | 186 | |
5 | over a period [prep] time | 184 | |
6 | over a period [prep] time | 184 | |
7 | over a period [prep] [noun pl] | 110 | |
8 | over a period [prep] year | 62 | |
9 | over a period [prep] years | 62 | |
10 | over a period [prep] [adv] | 40 | |
11 | over a period [prep] [adv] | 37 | |
12 | over a period [prep] two | 33 | |
13 | over a period [prep] two | 33 | |
14 | over a period [prep] [det] | 32 | |
15 | over a period [prep] [art] | 29 | |
16 | over a period [prep] [art] | 29 | |
17 | over a period [prep] three | 27 | |
18 | over a period [prep] three | 27 | |
19 | over a period [prep] a | 27 | |
20 | over a period [prep] a | 27 | |
21 | over a period [prep] week | 19 | |
22 | over a period [prep] weeks | 19 | |
23 | over a period [prep] month | 17 | |
24 | over a period [prep] months | 17 | |
25 | over a period [prep] [prep] | 16 | |
26 | over a period [prep] [prep] | 16 | |
27 | over a period [prep] several | 16 | |
28 | over a period [prep] several | 16 | |
29 | over a period [prep] five | 14 | |
30 | over a period [prep] about | 14 |