No | Pattern | Freq | Relations |
---|---|---|---|
1 | be [vb pp] over a period [prep] | 41 | |
2 | be [vb pp] over a period of | 40 | |
3 | be [vb pp] over a period of | 40 | |
4 | be [vb pp] over a period [prep] | 15 | |
5 | was [vb pp] over a period [prep] | 11 | |
6 | be made over a period [prep] | 5 |