No | Pattern | Freq | Relations |
---|---|---|---|
1 | years there have been [adj] | 31 | |
2 | years there have [been] [adj] | 31 | |
3 | years there has [been] [adj] | 17 | |
4 | years there have [been] [adj] | 11 | |
5 | years there have [been] increasing | 6 | |
6 | years there have [been] considerable | 6 |