 |
| shale: 61 phrases in 15 subjects |
| Chemistry | 2 |
| Coal | 3 |
| Construction | 10 |
| Earth sciences | 9 |
| Environment | 2 |
| General | 7 |
| Industry | 2 |
| International Monetary Fund | 1 |
| Life sciences | 2 |
| Metallurgy | 9 |
| Natural resourses and wildlife conservation | 6 |
| Oil / petroleum | 4 |
| Statistics | 1 |
| Technology | 2 |
| Transport | 1 |