“2-yr mean citedness” is the OpenAlex field summary_stats.2yr_mean_citedness (CC0): mean citations per paper over a two-year window. It is a raw bibliometric field, not a journal rating, and is not used for default ranking.
Arts and Humanities20Physics and Astronomy18Biochemistry, Genetics and Molecular Biology7Philosophy. Psychology. Religion: Philosophy (General)1Science: Biology (General): Evolution1Science: Chemistry: Organic chemistry: Biochemistry1