No | Pattern | Freq | Relations |
---|---|---|---|
1 | over a [adv] [adj] period of | 8 | |
2 | over a [adv] [adj] period [prep] | 8 | |
3 | over a [adv] [adj] period [prep] | 8 | |
4 | over a [adv] [adj] period of | 8 | |
5 | over a [adv] [adj] period [prep] | 6 | |
6 | over a [adv] long period [prep] | 5 |