No | Pattern | Freq | Relations |
---|---|---|---|
1 | a long period [prep] [noun sg] | 172 | |
2 | a long period of [noun] | 169 | |
3 | a long period [prep] [noun] | 160 | |
4 | a long period [prep] time | 115 | |
5 | a long period [prep] time | 115 | |
6 | a longer period [prep] [noun] | 19 | |
7 | a long period [prep] [noun pl] | 5 |