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