Claim: Mary Marvel precedes Supergirl by more than two lustra.
Evidence: Mary Marvel was one of the first female spin-offs of a major male superhero , and predates the introduction of Superman 's female cousin Supergirl -LRB- also created by Otto Binder -RRB- by more than a decade.
A lustrum -LRB- , plural lustra -RRB- was a term for a five-year period in Ancient Rome.