"NHL Repeat Containing 1" refers to a specific instance in the National Hockey League where a team successfully wins the championship title in consecutive seasons. This achievement highlights a team's dominance and consistency in performance over a period of time. In the context of the Stanley Cup, which is awarded annually, repeating as champions is a significant accomplishment. It requires not only skill and teamwork but also the ability to maintain high levels of performance despite the challenges posed by other competitive teams in the league.