No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] over a [adj] period [prep] | 28 | |
2 | [vb pp] over a [adj] period [prep] | 27 | |
3 | [verb] over a [adj] period [prep] | 25 | |
4 | [verb] over a [adj] period of | 24 | |
5 | [verb] over a [adj] period of | 24 | |
6 | [verb] over a long period [prep] | 17 | |
7 | [verb] over a long period [prep] | 14 |