多時 is read as たじ (taji) and means lots of time.
たじ
taji
じかんぶんかつたげんせつぞくほうしき
TDMA
じぶんかつたげんせつぞく
Time Division Multiple Access
じぶんかつたじゅうそうち
Time Division Multiplexer
たしょう
amount
ただい
great (quantity, amount, etc.)
たぶん
probably
おおい
frequent
おおめ
somewhat larger (amount)
たよう
busyness
た
multi-
たはつ
repeated occurrence
たじゅう
multiple