No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] over a prolonged period [prep] | 8 | |
2 | over a prolonged period [prep] time | 7 | |
3 | over a prolonged period [prep] [noun sg] | 7 | |
4 | over a prolonged period [prep] time | 7 | |
5 | over a prolonged period [prep] [noun] | 7 |