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lowest frequency : 55 phrases in 15 subjects |
Astronomy | 3 |
Communications | 24 |
Earth sciences | 1 |
Electric motors | 1 |
Electronics | 13 |
Environment | 1 |
General | 1 |
Health care | 1 |
Information technology | 1 |
Mechanic engineering | 1 |
Medical | 1 |
Metallurgy | 3 |
Natural sciences | 1 |
Technology | 1 |
Transport | 2 |