Table 2 Overview of issuing institutions.
2001–2008 | 2009–2014 | 2015–2022 | |
|---|---|---|---|
Volume of literature (articles) | 6 | 59 | 152 |
Nodes (pcs) | 4 | 57 | 143 |
Frequency (times) | 12 | 131 | 343 |
Node/frequency ratio | 0.33 | 0.44 | 0.42 |
Standard deviation of frequencies | 2.0 | 1.48 | 1.82 |
Co-occurrence (times) | 4 | 50 | 128 |
Co-occurrence/node ratio | 0.33 | 0.38 | 0.37 |