No | Pattern | Freq | Relations |
---|---|---|---|
1 | over [art] long period [vb mod] | 5 | |
2 | over a long period [modal v] | 5 | |
3 | over [art] long period [modal v] | 5 | |
4 | over [art] long period [modal v] | 5 | |
5 | over [art] long period [modal v] | 5 | |
6 | over a long period [modal v] | 5 |