 |
|
recurrence : 51 phrases in 18 subjects |
| Astronomy | 2 |
| Automated equipment | 3 |
| Communications | 6 |
| Earth sciences | 1 |
| Electronics | 5 |
| Geology | 1 |
| Health care | 4 |
| High energy physics | 1 |
| Law | 1 |
| Life sciences | 3 |
| Mathematics | 5 |
| Natural resourses and wildlife conservation | 1 |
| Radiation | 8 |
| Scientific | 2 |
| Social science | 4 |
| Statistics | 1 |
| Technology | 2 |
| Transport | 1 |