Relative recency classification
| Category | Timeframe | Description |
|---|---|---|
| Oldest | More than10 years old (before 2015) | Foundational or earliest works |
| Older | 6–10 years old (2015–2018) | Early but still relevant studies |
| Intermediate (mid) | 3–5 years old (2019–2021) | Transitional contributions |
| Recent | 1–2 years old (2022–2023) | Emerging and timely studies |
| Very recent | Within the last year (2024) | Cutting edge, latest findings |
| Most recent | Current year (2025) | Ongoing and most up-to-date research |
| Category | Timeframe | Description |
|---|---|---|
| Oldest | More than10 years old (before 2015) | Foundational or earliest works |
| Older | 6–10 years old (2015–2018) | Early but still relevant studies |
| Intermediate (mid) | 3–5 years old (2019–2021) | Transitional contributions |
| Recent | 1–2 years old (2022–2023) | Emerging and timely studies |
| Very recent | Within the last year (2024) | Cutting edge, latest findings |
| Most recent | Current year (2025) | Ongoing and most up-to-date research |
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