 |
| network frequency: 21 phrases in 13 subjects |
| Acoustics | 1 |
| Communications | 1 |
| Computer networks | 2 |
| Electronics | 2 |
| Energy industry | 1 |
| Energy system | 1 |
| Mass media | 1 |
| Mathematics | 1 |
| Medical appliances | 1 |
| Military | 1 |
| Occupational health & safety | 1 |
| Technology | 6 |
| Telecommunications | 2 |