No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] over a [adj] period of | 24 | |
2 | [verb] over a [adj] period of | 24 | |
3 | [vb pp] over a [adj] period of | 23 | |
4 | [verb] over a [adj] period of | 22 | |
5 | [verb] over a long period of | 15 | |
6 | [verb] over a long period of | 13 |