<human>:  In the novel, ‘1984’ by George Orwell, how many times does the word ‘Big Brother’ appear in the novel?
<bot>: Big Brother is mentioned in the novel a total of 4 times. The first time is in Chapter 2, when Winston Smith says, "Big Brother is watching you." The second time is in Chapter 8, when Winston Smith says, "I have seen the face of Big Brother." The third time is in Chapter 11, when Winston Smith says, "Big Brother is always watching you." The fourth time is in Chapter 12, when Winston Smith says, "Big Brother is always watching you."