No | Pattern | Freq | Relations |
---|---|---|---|
1 | over a [adj -er] period of [noun sg] | 7 | |
2 | over a [adj -er] period of [noun sg] | 7 | |
3 | over a [adj -er] period [prep] [noun sg] | 7 | |
4 | over a [adj -er] period [prep] time | 7 | |
5 | over a longer period [prep] [noun sg] | 6 |