What term describes a detail, image, or character type that appears frequently in literature and myth?

The term that describes a detail, image, or character type that appears frequently in literature and myth is "archetype." Archetypes are universal patterns or symbols that resonate across different cultures and traditions, embodying fundamental human experiences and characteristics. For example, the "hero," the "mentor," and the "trickster" are common character archetypes found in many stories, helping to convey specific themes and values that audiences can recognize and relate to.

In contrast, a symbol typically represents a deeper meaning beyond its literal sense, while allegory conveys a broader moral or political message through a narrative. A motif, on the other hand, refers to a recurring element or theme within a single work or across multiple works but lacks the same cultural depth and universality associated with archetypes. Thus, "archetype" is the most fitting choice for this definition, highlighting its significance in the study of literature and mythology.