No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] [prep] a long period of | 62 | |
2 | [noun] [prep] a long period of | 62 | |
3 | [noun sg] [prep] a long period of | 50 | |
4 | [noun] over a long period of | 40 | |
5 | [noun pl] [prep] a long period of | 10 | |
6 | [noun] of a long period of | 10 | |
7 | [noun] for a long period of | 6 |