Figure 2
The horizontal axis lists years from 2014 to 2025, and the vertical axis ranges from 0 to 100 publications. Publication frequencies are 1 in 2014, 2 in 2015, 0 in 2016, 0 in 2017, 1 in 2018, 3 in 2019, 0 in 2020, 5 in 2021, 12 in 2022, 41 in 2023, 78 in 2024, and 71 in 2025.Frequency of phygital publications