| Type of Keywords | Occurrences in Applied Articles | Number of Applied Articles | Occurrences in Theoretic Articles | Number of Theoretic Articles |
| Applied | 86 | 4.35 | 1.118 | 0.412 |
| Theoretical | 0.278 | 0.222 | 77.53 | 9.11 |
| “Theory” | 24 | 3 | 28 | 9 |