This is the 9222nd most frequent Polish word.
telewizja
Telewizja: television.
In this sentence, 'telewizję' is the object of the verb 'oglądałem', referring to the act of watching television.
Wczoraj oglądałem telewizję przez trzy godziny.
Yesterday, I watched television for three hours.
Here, 'telewizja' is the subject of the sentence, indicating television as a concept or industry.
Telewizja jest ważnym medium informacji.
Television is an important medium of information.
In this usage, 'telewizję' refers to the physical device, the television set.