 |
| perturbation: 119 phrases in 20 subjects |
| Astronautics | 1 |
| Communications | 18 |
| Earth sciences | 11 |
| Economy | 5 |
| Electronics | 20 |
| Energy industry | 1 |
| Environment | 10 |
| Finances | 9 |
| Forestry | 1 |
| General | 3 |
| Health care | 2 |
| Labor law | 1 |
| Law | 4 |
| Life sciences | 8 |
| Mechanic engineering | 1 |
| Medical | 5 |
| Metallurgy | 1 |
| Natural sciences | 4 |
| Statistics | 7 |
| Transport | 7 |