Time period
From Tardis Wiki, the free Doctor Who reference
Time period was a term which refered to different points in time.
Visting Shoreditch November 1963 with Ace, the Seventh Doctor observed that her clothing and tape deck were anachronistic for the time period. He later noted that the aerial of a van used by the Intrusion Counter-Measures Group was a very sophisticated piece of equipment for the time period. (TV: Remembrance of the Daleks)
