Table:
text: Jack Brabham
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Points
1967 Brabham Racing Organisation Brabham BT24 Repco V8 46 (48)
1968 Brabham Racing Organisation Brabham BT24 Repco V8 2
1968 Brabham Racing Organisation Brabham BT26 Repco V8 2
1969 Brabham Racing Organisation Brabham BT26A Cosworth V8 14
1970 Brabham Racing Organisation Brabham BT33 Cosworth V8 25

Question: How many times is chassis Brabham bt33 among Jack Brabham's complete Formula 1 World Championship results?