Across various literary works, “insomnia” is not merely a descriptor for sleeplessness but a layered symbol conveying inner turmoil, existential dread, and the unsettling passage of time. In Chekhov’s writings, for instance, the term is repeatedly invoked, suggesting a relentless state of alertness and a creeping malaise that marks the transition from day to night ([1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11]). In contrast, authors like Agatha Christie and Guy de Maupassant use it to sketch individual afflictions that subtly reveal a character’s psychological landscape ([12], [13]). Even in more analytical and classical contexts—such as Freud’s discussion of nervous individuals who initially chose wakefulness, or Poe’s intertextual reference to mythic reveries—the word “insomnia” emerges as a powerful metaphor linking physical restlessness with deeper, often unspoken, mental strife ([14], [15]).