No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] [num] years ' duration | 56 | |
2 | [prep] [num] years ' duration | 56 | |
3 | of [num] years ' duration | 52 | |
4 | of [num] years ' duration | 52 | |
5 | [conj] [num] years ' duration | 12 | |
6 | [coord] [num] years ' duration | 10 | |
7 | or [num] years ' duration | 9 | |
8 | or [num] years ' duration | 9 |