The term "gradation" has been wielded with remarkable versatility in literature, often serving as a conceptual bridge between discrete states or qualities. In scientific discourse, particularly in Darwin’s works, "gradation" delineates the continuous transformation in the natural world—from the structural innovations of bees [1] to the gradual evolution of dioptric structures in fishes and reptiles [2, 3]—emphasizing its role in the successive acquisition of traits [4, 5]. Similarly, poets like Alexander Pope employ "gradation" to underscore hierarchical order in both the animal realm and human faculties [6, 7, 8]. Moreover, the word extends metaphorically into broader arenas, ranging from the subtle shifts in emotional expression as seen in George Eliot’s portrayal of a laborer’s elusive smile [9] to musical tuning [10] and even in the philosophical musings on the "gradation of Being" described by Nietzsche [11]. This rich diversity of usage underscores gradation as a powerful literary tool for articulating gradual change and hierarchical progression across various domains.