“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 Humanities47Social Sciences36Economics, Econometrics and Finance30General Works: History of scholarship and learning. The humanities1Law: Law in general. Comparative and uniform law. Jurisprudence1Social Sciences: Social sciences (General)1