collocation | frequency |
---|---|
electric vehicles | 6 |
internal combustion | 4 |
combustion engines | 4 |
electric cars | 3 |
electric vehicle | 2 |
nickel metal | 2 |
metal hydride | 2 |
hydride batteries | 2 |
collocation | frequency |
---|---|
internal combustion engines | 4 |
nickel metal hydride | 2 |
metal hydride batteries | 2 |