No | Pattern | Freq | Relations |
---|---|---|---|
1 | over a [adj] period of | 134 | |
2 | over a [adj] period of | 128 | |
3 | over a long period of | 77 | |
4 | over a prolonged period of | 8 | |
5 | over a considerable period of | 7 | |
6 | over a short period of | 7 | |
7 | over an [adj] period of | 6 | |
8 | over a given period of | 5 |