Reign is he period during which a king or queen occupies the throne (or rules).
reign
The time a monarch rules is his or her reign. However for someone who's in office for a very long time or a time of major social change, you might also hear "period" or "era"...Victorian era, Edwardian period, during Elizabethan times (Elizabeth I).
Queen Elizabeth - I was Queen at that time
Call a Marina, rules are many and various
she was a queen in Iraq 2350 BC, during Soumer time
Queen Elizabeth the I
Isabella
Elizebeth 1
James I
Elizabeth 1
Typically, a honeybee hive contains one queen bee. The queen is the sole reproductive female in the colony, responsible for laying eggs and maintaining the hive's population. Although there can be periods of time when multiple queens exist during swarming or supersedure, generally, only one queen rules per hive at any given time.
Queen Elizabeth 1 who reigned from 1558 to 1603.