Scribal, Linguistic, and Sectional Variation in the Distribution of -daiin-

Core Focus: This paper examines the distribution of 864 exact occurrences of the token daiin across approximately 37,900 clean Voynich tokens, analyzing its variance relative to scribal hands, Currier language classifications, and thematic sections. Key Findings: The analysis reveals that daiin is highly unevenly distributed—concentrated heavily in Hand 1, Currier A material, and the Herbal section. Furthermore, an apparent manuscript-wide temporal decline in Hand 1 is shown to be primarily a sectional artifact of transitioning from Herbal to Pharmaceutical material, with usage remaining stable within the Herbal section itself. Methodological Significance: The findings demonstrate that daiin frequency is governed by structured contextual variation rather than simple manuscript-wide rules, providing supporting evidence compatible with the hypothesis that the Voynich writing system encodes an underlying language-like system.