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Preprinting has become an increasingly important component of the scholarly communication system, facilitating rapid open dissemination of scientific knowledge. This study investigates the adoption of preprinting over time, focusing on how it varies across scientific disciplines and geographical regions. We analyzed bibliometric data on 4M preprints and 105M peer-reviewed outputs in the period 1991-2023. Peer-reviewed outputs were linked to preprints using data from Dimensions, OpenAlex, and Crossref, resulting in 2.2M peer-reviewed outputs linked to a preprint. Our findings indicate a strong growth in preprinting, with a nearly threefold increase in the number of preprints published between 2017 and 2022. The adoption of preprinting is highest in the physical and mathematical sciences, particularly among researchers in the Americas and Europe. In recent years, preprinting has also increased notably in the information and computing sciences and the life and medical sciences, driven primarily by researchers in North America and Western and Northern Europe. Preprinting remains relatively uncommon in the humanities and the social and behavioral sciences. Asia demonstrates low preprint adoption, with Eastern Asia showing a modest increase in recent years. Preprint adoption in specific disciplines varies significantly across regions, showing that preprint adoption is shaped by the interplay between disciplines and regions.