No | Pattern | Freq | Relations |
---|---|---|---|
1 | [vb pp] [prep] a [adj] period [prep] | 140 | |
2 | [vb pp] [prep] a long [noun] [prep] | 130 | |
3 | [vb pp] [prep] a long [noun sg] [prep] | 122 | |
4 | [verb] [prep] a long period [prep] | 42 | |
5 | [vb pp] [prep] [art] long period [prep] | 35 | |
6 | [vb pp] [prep] a long period [prep] | 32 |