How mch time had passed since victors creation of the first monster?

In Mary Shelley's "Frankenstein," it is suggested that several years pass between Victor Frankenstein's creation of the first monster and his subsequent encounters with it. Although the exact timeline is not explicitly stated, it is implied that Victor's obsession with his creation consumes much of his life, leading to a significant passage of time marked by his isolation and despair. Ultimately, the narrative conveys a sense of prolonged struggle and the consequences of Victor's actions over several years.