Table:
text: Geoff Lees
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Points
1978 Mario Deliotti Racing Ensign N175 Ford V8 0
1979 Candy Tyrrell Team Tyrrell 009 Ford V8 0
1980 Shadow Cars Shadow DN11 Ford V8 0
1980 Shadow Cars Shadow DN12 Ford V8 0
1980 Unipart Racing Team Ensign N180 Ford V8 0
1980 RAM Theodore Williams FW07B Ford V8 0
1982 Theodore Racing Team Theodore TY02 Ford V8 0
1982 John Player Team Lotus Lotus 91 Ford V8 0

Question: Give the total number of years for Ensign n175 chassis for Geoff Lees?