No | Pattern | Freq | Relations |
---|---|---|---|
1 | [noun] [vb past] [be] in operation | 9 | |
2 | [noun sg] [vb past] [be] in operation | 8 | |
3 | [vb past] [be] in operation [prep] | 12 | |
4 | [vb past] [be] in operation [prep] | 12 | |
5 | [vb past] [be] in operation since | 5 | |
6 | [vb past] [be] in operation for | 5 | |
7 | [vb past] [be] in operation since | 5 | |
8 | [vb past] [be] in operation for | 5 |