No | Pattern | Freq | Relations |
---|---|---|---|
1 | [be] [prep] two years ' duration | 7 | |
2 | [be] of two years ' duration | 7 | |
3 | be [prep] two years ' duration | 7 | |
4 | [be] [prep] two years ' duration | 7 | |
5 | [is] [prep] two years ' duration | 6 | |
6 | is [prep] two years ' duration | 6 |