Number of teams and team seasons included in the analyses, including the mean length and range of the scheduled winter break (in days) per country
| Country | Number of teams | Number of team seasons | Mean length of scheduled winter break (days) | Range (days) |
| England | 21 | 75 | No break | – |
| Belgium | 2 | 10 | 8.6 | 7–10 |
| Croatia | 1 | 1 | 21.0 | – |
| Denmark | 1 | 2 | 29.5 | 29–30 |
| France | 4 | 12 | 8.1 | 6–10 |
| Germany | 5 | 19 | 14.0 | 8–17 |
| Greece | 2 | 3 | 6.3 | 6–7 |
| Italy | 5 | 21 | 7.9 | 2–14 |
| Netherlands | 2 | 13 | 12.5 | 11–14 |
| Portugal | 4 | 18 | 6.4 | 4–10 |
| Scotland | 1 | 3 | 4.3 | 0–7 |
| Slovenia | 1 | 3 | 23.0 | 12–32 |
| Spain | 5 | 20 | 6.9 | 5–10 |
| Switzerland | 1 | 3 | 24.0 | 21–27 |
| Turkey | 1 | 3 | 8.0 | 6–9 |
| Total | 56 | 206 | 10.0 (English teams excluded) | 0–27 |