No | Pattern | Freq | Relations |
---|---|---|---|
1 | have [vb pp] over a [adj] period | 14 | |
2 | [verb] [vb pp] over a [adj] period | 14 | |
3 | [verb] [vb pp] over a long period | 12 | |
4 | [verb] [vb pp] over a long period | 12 | |
5 | [vb -s] [vb pp] over a [adj] period | 5 | |
6 | has [vb pp] over a [adj] period | 5 |